161~-216500 Tach/DwelllVoltmeter
Contents
1. BREAKER POINT IGNITION SYSTEMS FIGURE 6 TACHOMETER CONNECTIONS TO CHRYSLER AND AMERICAN MOTORS IGNITION SYSTEMS TACH DWELL TO BREAKER POINTS SYSTEMS AND TACH TO ELECTRONIC SYSTEMS Connect the GREEN lead to the negative terminal of the ignition coil as shown in FIGURE 7 Connect the BLACK clip to a secure ground connec tion as shown in FIGURE 1 BALLAST A Dio E UNIT OR BREAKER POINTS GREEN CLIP CHRYSLER AND AMERICAN MOTORS CONVENTIONAL AND TRANSISTOR IGNITION SYSTEMS FIGURE 7 TACHOMETER ENGINE RPM MEASUREMENT PROCEDURE Connect the BLACK and GREEN leads of the TACH DWELL VOLTMETER as described on pages 3 and 4 for the particular engine you are trouble shooting Place the FUNCTION SELECTOR Switch to the RPM position Start the engine and operate it at idle RPM As illustrated in Figure 1 observe the upper RPM scale 0 20 for 8 cylinder engines and the lower RPM scale 0 25 for 6 cylinder engines Multiply the indicated number by 100 to obtain the actual engine speed in RPM NOTE For 4 cylinder engines multiply the 8 cylinder scale by 200 to obtain the actual engine speed in RPM Engine DWELL and Timing may now be performed at the engine speed specified in your vehicle owner s manual BREAKER POINTS RESISTANCE TEST This procedure is not for electronic ignition systems During engine tune ups or repair this test should be done before adjusting the engine timing t2. as specified on the decal in the engine compartment Figure 19 illustrates typical locations of the idle speed and idle mixture screws on single and multi barrel carburetors SINGLE BARREL CARBURETOR IDLE SPEED ADJUSTMENT SCREW IDLE MIXTURE IDLE SPEED SCREWS ADJUSTMENT SCREW TYPICAL IDLE SPEED AND MIXTURE SCREW LOCATIONS FIGURE 19 4 Start the engine and turn the idle speed screw until specified idle speed is indicated 5 On engines without exhaust emission control sys tems turn the idle mixture screw in lean until the idle speed starts to decrease then turn it back out rich just until the idle speed reoches a maximum Further richening past this point will only waste fuel This should be done slowly to allow engine speed to stabilize 6 On multi barrel carburetors repeat this proce dure on each idle mixture screw until the highest idle speed and smoothest operation is obtained If the engine idle speed is now higher than the manufacturer s specification turn the idle speed adjustment screw until the specified idle speed is indicated and readjust the mixture screws with the above procedure 0 7 NOTE On engines equipped with exhaust emis sion control systems air injection pumps and pos itive crankcase ventilation refer to the decal in the engine compartment or the owners manual for idle adjustment specifications PLUG END OF VACUUM LINE DISTRIBUTOR VACUUM HOSE CONNECTION FIGURE 20 VOLTS PR
3. manual diagnostic procedures for your particular vehicle to correct the problem TYPICAL FORD CHRYSLER AND AMERICAN MOTORS BREAKER POINT DISTRIBUTORS FIGURE 13 ENGINE TIMING The engine should be timed at each tune up after the dwell adjustment but before idle speed and mixture adjustments are made Check your owners manual for the location of the timing marks and the timing specifications Refer to Figure 14 Then use a timing light to time the engine to specifications Connect the Timing Light to the battery and engine in accordance with the instructions supplied with the instrument or as shown in Figure 15 Timing lights recommended for best service the Sears Craftsman bright chrome Models 2194 advance timing light and 2134 both accurate to 8000 RPM The popular and reliable Sears models 21174 and 21684 timing lights are accurate to 6000 and 4000 RPM respectively For safe operation all Sears tim ing lights inductively clamp around the spark plug wire without need for disconnecting high voltage wires or exposing spark plug caps Visit your local Sears retail or catalog store for these products PRELIMINARY 1 Check the distributor dwell angle and adjust to the manufacturer s specifications if necessary before timing the engine 2 Clean the dirt the timing marks 3 Disconnect the vacuum advance hose from the distributor and seal the end of the hose with tape or a plug as shown in
4. the distributor cap replace the wire to the BAT terminal of the integral coil distributor or remove the jumper wire from terminal 6 of the diagnostic connector CHARGING SYSTEM VOLTS TEST 1 Connect the test leads as shown in Figure 1 GREEN clip to the Battery POS terminal Set the FUNCTION SELECTOR switch to the VOLTS position 2 Start the engine Allow it to run for at least 5 minutes at 1500 to 2000 RPM Observe the reading on the 0 16 volt scale as shown in FIGURE 21 The reading should gradually from about 12 5 volts before starting to 13 2 volts to 15 2 volts at the end of the 5 minutes with or without the headlights and blower motor on Readings lower than 13 2 indicate either a worn out battery defective generator or alternator or defective or improperly adjusted voltage regulator Readings above 15 2 are indicative of a defective or improperly adjusted voltage regulator Replace repair or adjust the defective part as required POINTS LOW VOLTAGE TEST The POINTS scale is also a 0 2 volt range as shown in Figure 22 This scale is useful for checking volt age drops in the vehicle s electrical system Set the FUNCTION SELECTOR SWITCH to the VOLTS position Corroded or loose connections and frayed or broken cables can cause hard starting To test for these conditions refer to Figure 23 and alternately connect the clips between 1 and 2 2 and 3 4 and 5 5 and 6 6 and 7 7 and 8 with the starter tur
5. D DWELL SCALES FIGURE 10 DWELL MEASUREMENTS Refer to Figure 10 for identification of the RPM and DWELL Scales Set the FUNCTION SELECTOR SWITCH to RPM Start the engine and operate it at the specified idle RPM Set the FUNCTION SELEC TOR SWITCH to DWELL Compare the meter dwell angle reading with the manufacturer s specification for the engine If the dwell reading is higher or lower than the manufacturer s specification adjust the distributor points as illustrated below and des cribed in the following sections 1 For 4 cylinder engines multiply the 8 cylinder RPM scale by 200 and the 8 cylinder Dwell scale by 2 PLUG END OF VACUUM LINE DISTRIBUTOR VACUUM HOSE CONNECTION FIGURE 11 DWELL ADJUSTMENT CONVENTIONAL BREAKER POINT SYSTEMS On GM distributors with a small metal slide cover lift the cover and insert a Allen wrench in the adjusting screw socket and adjust the dwell by turn ing the wrench as shown in Figure 12 On Ford Chrysler American Motors and other distributors not equipped with a small metal access slide cover perform the following steps while referring to Figure 13 1 Remove coil wire from center tower of distributor cap and ground the wire by connecting the loose end to the engine or frame 2 Remove the distributor cap and rotor 3 Connect a remote starter switch to the vehicle or have an assistant crank the engine for you 4 With ignition switch ON and engine cranking
6. ELIMINARY CHECKS The VOLTS switch position is used to test the crank ing and charging volts in the vehicle CONSULT THE OPERATING MANUAL OF THE VEHICLE BEING TESTED FOR SPECIFIC VOLT AGES AND TEST PROCEDURES The following information will serve as a general guide for making charging system tests Before making VOLTS tests Check the fan belt it should be tensioned according fo the manufacturer s specifications Check the generator or alternator pulley and mounting bolts They should be tight Make sure that the charging system wiring and the battery cables are in good condition and that con nections are tight Make sure the battery is clean and that the liquid level in each cell is above the plates The engine and all parts of the charging system should be at normal operating temperature before making any electrical tests If the engine is cold operate the engine at idle speed for at least 15 minutes before making any tests CRANKING VOLTS TEST 1 To prevent the engine from starting while crank ing remove the high tension lead from the cen ter of the distributor cap and ground it by con necting the loose end to the engine or frame on systems with a separate coil For systems with integral coil as shown in Figure 3 disconnect the primary wire from the BAT terminal on the distributor cap CAUTION The TACHOMETER terminal must NEVER be con nected to ground at the distributor cap as damage to the distr
7. Figure 16 PROCEDURE 1 Start the engine and allow it to warm up 2 After the engine is warm operate it at idling speed or the RPM specified in the vehicle manual w Aim the timing light at the timing marks press the switch to operate the timing light and observe the timing mark The position of the tim ing mark must agree with the manufacturer s specication lf it does not reset the timing as follows 4 Loosen the distributor hold down clamp JUST enough to permit rotating the distributor body by hand as shown in Figure 16 5 Slowly turn the distributor in the correct direction as shown in Figure 17 a Against the rotor rotation to advance the timing b With the rotor rotation to retard the timing 6 Repeat Step 3 7 When the specified mark is in line with the tim ing line securely tighten the distributor hold down clamp and recheck timing 8 Check the idle RPM after the engine is timed and re adjust to the manufacturer s specification if necessary 9 Remove the plug from the vacuum hose and attach it to the distributor diaphragm connection VARIOUS TIMING MARK CONFIGURATIONS FIGURE 14 TYPICAL TIMING LIGHT USAGE FIGURE 15 LOOSEN HOLD DOWN BOLT PLUG END OF VACUUM LINE LOOSENING THE HOLD DOWN CLAMP FIGURE 16 ROTOR ROTATION ADVANCES RETARD ENGINE TIMING ADJUSTMENT PROCEDURE FIGURE 17 DWELL VARIATION TEST the owner s manual decal and f
8. IVE TESTING READ CAREFULLY Read this Owner s Manual and these Rules for Safe Automotive Testing carefully Failure to follow instructions and safety rules could result in serious bodily injury and or damage to the instrument Before starting the engine set the parking brake and place gear selector in NEUTRAL on standard transmissions or PARK on automatic transmission The carbon monoxide in exhaust gas is highly toxic To avoid asphyxiation always operate vehicle in a well ventilated area If vehicle is in an enclosed area exhaust should be routed directly to the outside via leakproof exhaust hose When operating any test instrument from an auxiliary battery connect a jumper wire between the negative terminal of the auxiliary battery and chassis ground on the vehicle under test for negative ground systems For positive ground systems connect the jumper wire to the positive terminal of the auxiliary battery and chassis ground on the vehicle When working in a gar age or other enclosed area auxiliary battery should be located at least 18 inches above the floor to minimize the possibility of sparks igniting gasoline vapors and causing an explosion An automobile battery is capable of producing very high currents Therefore exercise reason able care when working near the battery to avoid electrical connections through tools wristwatch etc Avoid contact with battery electrolyte It can eat holes in clothing bu
9. L TEST AND 5 5 ecce tuer eere tios 295 left acre tere PLUIE 6 Dwell Adjustments Breaker Point Systems Dwell Readings Electronic Ignition ENGINE TIMING ims cox REN LS ME ut ProcedUre a s ned Sepe iiie isa qe eq s eue e eus S ola a orate DWELEVARIATION dew v rn rera sm epo vials vise IDLE SPEED AND CARBURETOR ADJUSTMENT 9 VOLTS PRELIMINARY CHECKS 9 GRANKING VOLTS TEST eia co s vcr oie vie ewww re 10 CHARGING SYSTEM VOLTS TEST 10 POINTS LOW VOLTAGE TEST 10 OTHER APPLICATIONS o op 2062 400 41900 5 41 4267 11 REPLACEMENT 85 12 ORDERING REPAIR 5 BACK COVER information this manual will serve as general guide for engine tune up and charging system tests and adjustments CONSULT THE VEHICLE SERVICE MANUAL FOR SPECIFIC TUNE UP INFORMA TION AND TEST PROCEDURES ALWAYS FOLLOW THE MANUFACTURER S SPECIFICATIONS AND TEST PROCEDURES FOR ADJUSTING DWELL ANGLE IDLE SPEED AND CHARGING SYSTEM OUTPUT ESPECIALLY VEHICLES WITH MODERN ELECTRONIC IGNITION AND EMISSION CO
10. NTROLS DO NOT ATTEMPT TO SERVICE VEHICLE WITHOUT MANUFACTURER S INSTRUCTIONS SOURCES FOR SERVICE INFORMATION The following is a list of publishers who have service manuals for yo ur specific vehicle nominal cost Write to them for availability and prices specifying the make style and model year of your vehicle A E A Tune Up Charts Automotive Assn 1301 W 22nd 52 202 Executive Plaza Building Oak Brook Illinois 60521 Chilton s Auto Repoir Manual GM Diognoss ond Repor Mome GM DR Manvci Heodquort P O Box 1185 Southfield Michigon 48075 Box 07150 Macksgon 48207 90 DAY WARRANTY IF WITHIN 90 DAYS FROM THE DATE OF PURCHASE THIS AUTOMOTIVE TEST INSTRUMENT FAILS DUE TO A DEFECT IN MATERIAL OR WORKMANSHIP RETURN IT TO THE NEAREST SEARS STORE THROUGHOUT THE UNITED STATES AND SEARS WILL REPAIR OR REPLACE IT FREE OF CHARGE THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE SEARS ROEBUCK AND CO DEPARTMENT 698 731A SEARS TOWER CHICAGO IL 60684 Mator s Acto Repos Manso 250 55 Street New New York 10079 National Service Dato Book National Automotive Service Inc Div Glenn Mitchell Manuals Inc Box 10465 Son Diego Cokformo 92110 4 Cerys Corporation Publications Dept 2506 Lowrence Ave Coster Ene Macksgon 48015 RULES FOR SAFE AUTOMOT
11. ale reading by 2 LOW VOLTAGE TEST FIGURE 23 REPLACEMENT PARTS PART NO DESCRIPTION 400 857 Case bottom 270 117 Screw Case Self tap 6 20 x 1 38 726 Cable Assembly Green and Black Clip 450 133 Cap Glamour 1000 425 Ignition Adapter Kit 2 1682 Instruction Manual not illustrated FIGURE 24 FREQUENTLY USED TUNE UP INFORMATION SEARS SPARK VEHICLE IDLE D WELL TIMING TUNE UP PLUG verc Bcd Tm Pe ign 20 2 owners manual MODEL NO 161 216500 HOW TO ORDER SPARE PARTS 2 Sears Solid State Electronic Tach Dwell Voltmeter Now that you have purchased your Tach Dwell Voltmeter should a need ever exist for repair parts or service simply contact any Sears Roebuck and Co store Be sure to pro vide all pertinent facts when you call or visit The model number of your Tach Dwell Voltmeter can be found on the front of the instrument WHEN ORDERING REPAIR PARTS ALWAYS GIVE THE FOL LOWING INFORMATION PART NUMBER PART DESCRIPTION MODEL NUMBER NAME OF ITEM All parts listed may be ordered from any Sears Service 1 Center and most Sears stores If the parts you need not stocked locally your order will be electronically transmitted to a Sears Repair Parts Distribution Center for handling SEARS ROEBUCK AND CO U S A CHICAGO ILLINOIS 60684
12. er look directly into carburetor throat while engine is cranking or running A sudden backfire can cause serious burns To avoid the possibility of a flash fire do not smoke or permit flame or spark to occur near carburetor fuel line fuel filter fuel pump or other potential sources of spilled gasoline or gasoline vapors Never remove radiator cap while the engine is hot Hot coolant escaping under pressure can cause serious burns The jack supplied with the vehicle should be used only for changing wheels Never crawl under car or run engine while vehicle is on jack When making electrical test connections to the vehicle do not use the carburetor or other fuel system components as a ground connection as a spark could ignite the gasoline vapors and cause a fire or an explosion GENERAL INSTRUCTIONS Connections For RPM Dwell Volts and Points Tests Connect the GREEN Clip to the distributor terminal on the ignition coil or TACH tachometer terminal on electronic ignition systems to measure RPM DWELL or POINTS condition Connect the GREEN clip to the battery Positive terminal to measure STARTING AND CHARGING VOLTAGES Connect the BLACK clip to a secure ground connec tion on the engine frame or alternator bracket as shown in Figure 1 The BLACK clip should be the last connection made and the first to be disconnected CAUTION Avoid connecting directly to the Battery Negative Terminal in the even
13. hat is changing the advance or retard of the distribu tor or breaker points DWELL time T NOTE Remove the distributor cap and inspect the breaker points Properly adjusted breaker points become light gray in color during normal use If they ore blued blackened or pitted they have exceeded their normal life or excessive current has been present in the primary circuit Check for excessively low coil resistance shorted turns low ballast resistor value and high battery voltage while the engine is run ning Correct any of the above problems replace the breaker points and proceed to the next step If the breaker points pass the visual inspection test also proceed to the next step 1 The engine must be OFF The test leads must connected as shown in Figure 1 GREEN clip to SDISTEZ 2 Set the FUNCTION SELECTOR knob to the VOLTS position 3 Replace the distributor cap and REMOVE THE HIGH TENSION LEAD FROM THE CENTER OF THE DISTRIBUTOR CAP AND GROUND IT BY CONNECTING THE LOOSE END TO THE ENGINE OR FRAME NOTE When testing a vehicle with dual points alternately block one set of points open with a piece of insulating material while the other set is being tested 4 TURN THE IGNITION KEY ON If the meter reads near full scale right the points are open as shown in Figure 8 Crank the engine a fraction of a revolution at a time until the meter reads in the left hand area of the scale as shown in Figure 8 The points a
14. ibutor ignition module can result For systems with an electrical diagnostic tor as shown in Figure 4 insert the GM diagnos tic spade terminal adapter in terminal No 6 and connect a jumper wire between this termi nal and a secure ground on the engine or frame Do not connect the TACH terminal at the distributor to ground as damage to the distributor ignition module can result 2 Connect the test leads as shown in FIG 1 GREEN clip to the Battery POS Set the FUNCTION SELECTOR SWITCH to VOLTS 3 Operate the starter for 10 seconds and observe the cranking voltage on the 0 16 volts scale as shown in Figure 21 A steady reading of more than 9 6 volts indicates that the battery cables and starter system are in good condition CRANKING AND CHARGING VOLTS TESTS FIGURE 21 10 4 A reading below 9 6 volts could be caused by a battery that is defective or not fully charged Fully charge the battery and repeat the test If the reading is still below 9 6 volts either the battery or starter is defective 5 A fluctuating voltage reading is indicative of a defect in the starter or battery or in the battery starter wiring circuit Refer to FIGURE 23 LOW VOLTAGE TEST for troubleshooting voltage drops in the battery starter wiring circuit Replace or repair any defective parts as required to restore cranking system to proper operation 6 To restart the engine replace the high tension lead to the center of
15. n ing During this test no reading should be higher than 2 volt If a reading higher than 2 volt is observed during any of these tests check the cable or connections involved clean and tighten the nections and replace the cables or solenoid when necessary If the meter reads to the left of zero during any of the above tests reverse the position of the GREEN and BLACK clips 8cyl 60 6cyl For 4 engine Double 8 scale Saem se Croas Points Sbhd State POINTS AND VOLTAGE SCALES FIGURE 22 OTHER APPLICATIONS G Foreign Cars Due to the vast array of different ignition systems found on import cars it is not possible to cover all applications in a manual of this type You are recommended to purchase a service manual for your particular vehicle and follow the procedures outlined by the vehicle manufacturers Mazda Rotary Engine The Mazda has two separate sets of breaker points and two ignition coils Each set of points must be adjusted individually for dwell angle normally 55 to 57 Consult your vehicle service manual for exact specifications Readings for both Tach and Dwell are the same as for a 4 cylinder engine When using the model 2165 TACH DWELL VOLTMETER multiply the 8 cylinder Tachometer scale reading by 200 to obtain the actual engine speed in RPM To measure dwell angle multiply the 8 cylinder Dwell Angle sc
16. nostic Connector usually near the left front fender Open the cover and ins rt the adapter in I Mic pm S287 socket 6 as shown in Figure 4 Connect the GREEN clip to the spade terminal adapter The BLACK clip must be connected to secure ground connection as shown in Figure 1 SPADE TERMINAL ADAPTER ADAPTER INCLUDED TACHOMETER CONNECTIONS TO GENERAL MOTORS CARS WITH DIAGNOSTIC CONNECTOR AND DELCO HIGH ENERGY IGNITION SYSTEMS FIGURE 4 TACHOMETER CONNECTIONS TO FORD ELECTRONIC IGNITION SYSTEMS AND TACHOMETER DWELL CONNECTIONS TO FORD BREAKER POINTS IGNITION SYSTEMS FORD ELECTRONIC IGNITION SYSTEMS On 1974 Ford Electronic ignition systems connect as shown in Figure 6 using the Ford adapter as shown On 1975 Ford transistor ignition systems connect the GREEN clip to the wire terminal on the DEC or TACH side of the coil as shown in Figure 5 Connect the BLACK clip to a secure ground connec tion as shown in Figure 1 GREEN CLIP FORD ADAPTER 1975 AND LATER FORD ELECTRONIC IGNITION SYSTEMS FIGURE 5 FORD BREAKER POINTS IGNITION SYSTEMS Lift the distributor terminal and slide the FORD adapter clip in place as shown in Figure 6 then push the terminal down on it Remove when the tests are finished Connect the BLACK clip to a secure ground connec tion as shown in Figure 1 1974 FORD ELECTRONIC AND ALL
17. observe reading on the Dwell scale 1 8 ALLEN WRENCH TYPICAL GENERAL MOTORS BREAKER POINTS DISTRIBUTOR FIGURE 12 5 To adjust Dwell loosen the locking screw slightly and adjust the point gap with a feeler gauge according to the procedure outlined in the vehi cle s service manual After adjustment tighten Jocking screw and recheck dwell while cranking engine Repeat procedure if necessary FIG 13 6 Reassemble distributor and recheck dwell read ing with engine operating at idle speed Repeat steps 5 and 6 if necessary DWELL READINGS ELECTRONIC AND TRANSISTOR IGNITIONS Due to the vast array of electronic ignition and engine control systems being used on late model cars it is essential that specific service information for the vehicle under test be obtained Although dwell angle is not adjustable on electronic systems the reading obtained is important and should be within the manufacturer s specified limits If it is not consult the manufacturer s shop manuals for diag nostic procedures and possible component replacement instructions To measure the DWELL angle on electronic ignition systems set the FUNCTION SELECTOR SWITCH to RPM Start the engine and operate it at the speci fied idle RPM Set the FUNCTION SELECTOR SWITCH to DWELL Compare the meter dwell angle reading with the manufacturer s specifications for the engine If the reading is higher or lower than the recommended value consult the owner s
18. ollow the instructions regarding vacuum line or advance retard solenoid connections when checking DWELL angle Usually the vacuum hose must be disconnected from the distributor and plugged as shown in Figure 20 Increase the engine speed from idle to about 1500 RPM and note the dwell angle Return the engine speed to idle and again note the dwell angle If the difference between the two dwell angle readings is more than 3 degrees check for exces sive wear in the breaker point plate and couplings or excessive wear in the distributor shaft gear and bushings MORE THAN 3 DEGREES FIRST READING SECOND 5 10 52025 READING DWELL VARIATION FIGURE 18 IDLE SPEED AND CARBURETOR ADJUSTMENT 1 The engine should be at normal operating temperature for this test Many cars built in 1970 and later have idle mixture screw limiter caps that restrict adjustment On these cars the carburetor should be adjusted according to the procedure in the manufacturer s service manual 2 Shut the engine off and connect the test leads as shown in FIGURE 1 or for Electronic Ignition Systems and late model cars see FIGURES 1 2 3 4 5 6 and 7 Set the FUNCTION SELECTOR Knob to the RPM position 3 Consult the manufacturer s service manual for the location of the idle speed adjusting screw and the idle mixture adjusting screw or screws Make idle speed and mixture adjustments according to the procedure outlined in the ser vice manual or
19. owners manual MODEL NO Caution Read Rules For Safe Operation and Complete Operating Test Procedures Carefully PRINTED IN U S A 161 216500 Tach Dwell Voltmeter 5 lt SERS CE E EDT 2 Solid Ste s ES X FOR 12 VOLT ELECTRONIC CONVENTIONAL IGNITION SYSTEMS OPERATING INSTRUCTIONS SAFETY RULES TUNE UP PROCEDURES REPAIR PARTS cape Se 4 SEARS ROEBUCK AND U S A CHICAGO ILLINOIS 60684 S YN 2 1682 OA m TUS TABLE OF CONTENTS PAGE SOURCES FOR SERVICE INFORMATION 1 WARRANINSSTRIEMENT x err erre 1 RULES FOR SAFE AUTOMOTIVE TESTING 2 GENERADINSTRUCTIONS REIR V o Ere 3 5 5 255 2 gt 555 25 gt 3 G M HEI Systems gt 2 2 2 464 AES M2 Diagnostic Conna Eeee Ae s aA sees ase 3 Ford lgnition Systems A 4 Chrysler and American Motors Ignition Systems Tachometer Engine RPM Measurement Procedure 5 BREAKER POINTS RESISTANCEAEST 20 2 en 5 BREAKER POINTS DWEL
20. re now closed 5 TEST RESULTS POINTS POINTS CLOSED S OPEN POINTS OK FIGURE 8 DEFECTIVE AREA DEFECTIVE POINTS FIGURE 9 the meter indicates in the DEFECTIVE AREA when the points are closed as shown in Figure 9 the points may be defective or the following faults may exist Poor distributor ground Poor connection on the primary lead from the distributor to the ignition coil Defective distributor pigtail lead Misaligned points Poor points plate ground inside distributor Correct the defect and repeat the test BREAKER POINTS DWELL TEST AND ADJUSTMENT NOTE This test and adjustment procedure is performed on cars with conventional breaker points ignition systems and transistorized ignition systems with breaker points such as some after market units This procedure is not to be used on vehicles equipped with various all electronic ignition systems or capacitive discharge systems Before performing the DWELL TEST and ADJUST MENT procedure read the vehicle owner s manual or the engine compartment decal to determine what should be done with the vacuum hose con nected to the distributor and the advance retard solenoids Most often the vacuum hose must be disconnected from the distributor as shown in Figure 11 and the end plugged with a golf tee or plug 10 15 510 15 20 25 29 510 35 40 25 9 10 20 95 40 80 Bcyl 60 RPM AN
21. rn skin and cause permanent damage to eyes Always wear splash proof safety goggles when working around the bat tery If battery electrolyte is splashed in the eyes or on skin immediately flush the affected area for 15 minutes with large quantities of clean water In case of eye contact seek medical aid The gases generated by a charging battery are highly explosive Do not smoke or permit flame or spark to occur near a battery at any time particularly when it is charging room or compartment containing charging batteries should be well ventilated to prevent accumula tion of explosive gases To avoid sparks do not disturb the battery charger connections while battery is charging and always turn charger off before disconnecting the bottery clips When removing or reconnecting battery cables make sure ignition switch and oll accessories are turned off Never odd acid to a battery once the battery has been placed in service Doing so may result in dangerous spattering of electrolyte Keep hands hair necktie loose clothing and test leads well away from fan blade fan belt power steering belt air conditioner belt and other mov ing engine parts as serious injury could result from entanglement Do not touch hot exhoust monifold rodiatos high voltage spark plug anc Spark voltages are not normally lethal but an involuntary jerk of the hands or arms caused by electrical shock may result in injury Nev
22. t that hydrogen gases are present which could explode from sparking connections CONNECTIONS FOR RPM DWELL VOLT AND POINTS TESTS FIGURE 1 TACHOMETER CONNECTIONS NOTE This analyzer is not designed to be used on capacitive discharge electronic ignition systems to measure RPM and DWELL If so used it may indicate incorrect engine speed and dwell readings or may cause the engine to run roughly or stall However typically only a very few import vehicles use this type system If you are in doubt as to the type system you have refer to your vehicle manual TACHOMETER CONNECTIONS TO GENERAL MOTORS DELCO HIGH ENERGY IGNITION SYSTEMS On 4 cylinder and in line 6 cylinder engines with a separate coil connect the GREEN clip to the open TACH terminal as indicated in Fig 2 On the inte gral coil V 8 or V 6 Systems slide the adapter onto the terminal as shown in Fig 3 Then connect the GREEN clip to the adapter The BLACK clip must be connected to a secure ground connection as shown in Figure 1 CONNECT GREEN CLIP TO THIS TERMINAL DELCO WITH SEPARATE COIL 4 Cylinder and in line 6 Cylinder Cars ADAPTER INCLUDED f ADAPTER lt DELCO HEI WITH INTEGRAL COIL V 6 and V 8 HEI SYSTEMS FIGURE 3 TACHOMETER CONNECTIONS TO GENERAL MOTORS CARS WITH DIAGNOSTIC CONNECTOR AND DELCO HIGH ENERGY IGNITION SYSTEMS To make RPM tests locate the Engine Electrical Diag
Download Pdf Manuals
Related Search