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AUTOMOTIVE
APPLICATIONS |
ALTERNATORS, VOLTAGE REGULATORS, SOLENOIDS, RELAYS, ELECTRONIC
IGNITION SYSTEMS, MAGNETIC CLUTCHES, STANDARD IGNITION
SYSTEMS, FUEL INJECTOR RELAYS & ELECTRICAL FUEL PUMPS.
A �MAG-PROBE� ISN�T THE LAST WORD IN ALTERNATOR, VOLTAGE
REGULATOR, AND IGNITION TROUBLE SHOOTING, BUT IT DOESN�T COST
SEVERAL HUNDRED DOLLARS.
A �MAG-PROBE� IS AN EFFECTIVE INSTRUMENT USED TO LOCATE THE MOST
COMMON PROBLEMS.
IF YOU HAVE SOME AUTOMOTIVE OR ELECTRICAL TRAINING YOU�LL
PROBABLY FIND MORE APPLICATIONS FOR THE �MAG-PROBE�.
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TROUBLESHOOTING
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FIRST, CHECK THE BATTERY.
CAUTION: (WEAR SAFETY GLASSES OR A FACE SHIELD WHEN
WORKING AROUND THE BATTERY.) YOU SHOULD HAVE A FULLY CHARGED
BATTERY BEFORE TESTING THE CHARGING SYSTEM. IF YOU DON�T HAVE
THE EQUIPMENT TO FULLY CHARGE AND TEST YOUR BATTERY, HAVE IT
CHARGED AND TESTED AT THE STORE WHERE IT WAS PURCHASED. MOST
STORES WILL TEST IT FREE AND CHARGE IT FOR A SMALL FEE. EVEN
IF YOU CHARGE IT OVER NIGHT WITH A TRICKLE CHARGER, YOU'RE
BATTERY STILL COULD HAVE A BAD CELL. P.S. CHECK THE BATTERY
WATER & SPECIFIC GRAVITY OF EACH CELL.
CHECK THE BATTERY CABLES!!! CLEAN THE BATTERY POSTS AND
CABLE ENDS WITH BAKING SODA AND WATER SOLUTION. (ABOUT 1 TSP
PER GLASS OF WATER). THEN CLEAN THE BATTERY CABLE ENDS AND
BATTERY POSTS WITH A WIRE BRUSH. YOU CAN PURCHASE ONE AT MOST
AUTOMOTIVE STORES.
WATCH OUT FOR BATTERY END CABLE REPLACEMENTS. THESE ARE USED
TO REPLACE THE CABLE END THAT ATTACHES TO THE BATTERY POST.
THESE CABLE ENDS USUALLY CAUSE PROBLEMS DUE TO OXIDATION. WHEN
OXIDATION OCCURS, THE CHARGE RATE WILL BE LOW AND THE STARTER
WILL NOT HAVE SUFFICIENT CURRENT TO TURN THE ENGINE AT NORMAL
STARTING SPEED. FOR BEST RESULTS, USE ONE PIECE BATTERY
CABLES.
MAKE SURE THE BLACK (NEGATIVE) BATTERY CABLE HAS A GOOD
GROUND. A BAD GROUND CAN CAUSE THE SAME PROBLEM AS A BAD
CATTERY CABLE.
YOU�VE ALREADY MADE SURE THE END THAT ATTACHES TO THE BATTERY
IS GOOD, SO CHECK THE OPPOSITE END THAT ATTACHES TO THE CARS�
FRAME. REMOVE THE BOLT THAT ATTACHES THE BATTERY CABLE TO THE
CARS� FRAME THEN CLEAN THE CABLE END AND METAL SURFACE AROUND
THE BOLT HOLE. BOLT THE CABLE FIRMLY TO THE FRAME.
CHECK THE FAN BELT. A HARD DRIED OUT OR LOOSE BELT WILL SLIP,
CAUSING LOW ALTERNATOR OUTPUT. CHECK WITH LOCAL DEALER PROPER
TIGHTNESS.
CHECK YOUR ALTERNATOR TROUBLE LIGHT AT NIGHT. IF IT WON�T GO
COMPLETELY OUT (APPEARS DIM) WITH THE HEADLIGHTS OFF, THE
ALTERNATOR BELT COULD BE LOOSE OR DRIED OUT.
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TESTS ALTERNATOR AND REGULATOR
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LOCATE THE LARGE WIRE ATTACHED TO THE ALTERNATOR TERMINAL
MARKED �BATT�. THIS WIRE IS USUALLY RED AND IS CONNECTED TO
THE UPPER OR LOWER SECTION OF THE ALTERNATOR. (SEE FIGURE
A-1) |
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IF YOU HAVE TROUBLE LOCATING THIS WIRE, THEN FOLLOW THE RED
BATTERY CABLE FROM THE POSITIVE BATTERY POST TO THE OPPOSITE
END FROM THE BATTERY. THE ALTERNATOR WIRE SHOULD BE CONNECTED
TO THIS POINT. THIS WIRE MUST BE CONNECTED BEFORE THE
ALTERNATOR CAN CHARGE THE BATTERY.
NOW MAKE THE LOOP IN THE ALTERNATOR WIRE BY TWISTING THE WIRE
ONCE. (SEE FIGURE A-1) THIS LOOP MUST BE AT LEAST 6
INCHES AWAY FROM THE ALTERNATOR TO PREVENT DETECTING THE
ALTERNATOR�S MAGNETIC FILED. THE LOOP SHOULD BE ONLY LARGE
ENOUGH FOR THE �MAG-PROBE�S� TIP TO SNUGLY FIT.
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TEST NO. 1 |
DO THIS TEST WITH THE ENGINE OFF. INSTALL THE HIGH/LOW RING
(FIG. 3) OF THE GENERAL INSTRUCTIONS.
INSERT THE �MAG-PROBES� TIP INTO THE TEST LOOP FROM ONE
DIRECTION, THEN THE OTHER.
IF THE LED LIGHTS, THE ALTERNATOR HAS A SHORT TO GROUND AND
SHOULD BE REPLACED.
REMOVE THE HIGH/LOW RING, AND STORE IT IN THE TUBE. REPLACE
THE METAL SHIELD ON THE �MAG-PROBE�.
START THE ENGINE AND INCREASE SPEED TO A FAST IDLE.
CAUTION: DURING THIS TEST,
KEEP YOU'RE HANDS CLEAR OF ALL MOVING PARTS IN THE ENGINE
COMPARTMENT, I.E. FAN BLADE, FAN BELT, ETC.
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TEST NO. 2
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TURN ON THE
HEADLIGHTS, AND ALL THE ACCESSORIES.
REMOVE THE �MAG-PROBE�S� SHIELD.
NOW HOLD THE �MAG-PROBE� CLOSE TO THE ALTERNATOR, SEE
FIGURE A-2. USUALLY FROM 1 TO 3 INCHES. SLOWLY MOVE THE
�MAG-PROBE� AROUND THE UPPER SECTION OF THE ALTERNATOR. AT
SOME POINT THE LED IN THE MAG-PROBE� SHOULD TURN ON, OR
CONTINUE FLASHING IN AND OFF.
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LIGHT, THE VOLTAGE REGULATOR IS PROBABLY BAD AND SHOULD BE
REPLACED. OTHER PROBLEMS CAN CAUSE THIS INDICATION, BUT IT�S
USUALLY THE VOLTAGE REGULATOR.
NOTE:
IF YOU REPLACE THE VOLTAGE REGULATOR, GO BACK TO TEST NO. 2.
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