GM Service Manual Online
For 1990-2009 cars only

DIESEL GENERATOR NO CHARGE POOR CONNECTION OF FIELD WIRE

CONDITION: THE 1981 "B" SERIES GENERATOR, WITH 5.7 LITER DIESEL ENGINE AND GAUGES, WILL NOT CHARGE. CAUSE: THE BROWN WIRE LEADING TO THE "FIELD" TERMINAL OF THE GENERATOR MAY NOT BE CONNECTED TO THE IGNITION SWITCH. CHECK BROWN WIRE AT GENERATOR FOR 12 VOLTS WITH IGNITION SWITCH ON. IF NO VOLTAGE IS PRESENT, THIS CORRECTION APPLIES. CORRECTION: USE THE PROCEDURE BELOW. THE BROWN/WHITE WIRE IN THE JUMPER HARNESS CONTAINS THE 10 OHMS RESISTANCE NECESSARY IN THE FIELD CIRCUIT, AND THIS WIRE MUST NOT BE SHORTENED. CONTACT YOUR ZONE OFFICE FOR THIS JUMPER HARNESS. 1.OPEN HOOD AND DISCONNECT BOTH NEGATIVE BATTERY CABLES. 2.REMOVE L.H. HUSH PANEL AND LOWER A/C DUCT. 3.SEPARATE FUSEBLOCK FROM BULKHEAD CONNECTOR BY REMOVING TWO (2) MOUNTING SCREWS, THEN RELEASING CLIPS AT CORNERS. PULL FUSEBLOCK OUT, LEAVING BULKHEAD CONNECTOR IN BULKHEAD. 4.LOCATE TERMINAL CX IN BULKHEAD CONNECTOR (SEE FIGURE 1). USE A SMALL BLADE SCREWDRIVER TO CRUSH THE LOCKING TAB, THEN REMOVE THE BROWN WIRE AND TERMINAL FROM THE CAVITY AND TAPE BACK OR CUT OFF UNUSED WIRE. 5.INSERT TERMINAL A OF THE JUMPER HARNESS (SEE FIGURE 2) INTO CAVITY CX. MAKE SURE LOCKING TAB LOCKS SECURELY INTO CAVITY. 6.REMOVE LOWER I.P. TRIMPLATE. DISCONNECT STEERING COLUMN SHIFT INDICATOR WIRE. LOWER STEERING COLUMN. 7.REMOVE BLACK CONNECTOR FROM IGNITION SWITCH. CAREFULLY REMOVE ORANGE WIRE FROM CONNECTOR BY DEPRESSING THE LOCKING TAB ON THE TERMINAL FROM THE OPPOSITE SIDE, USING A SMALL BLADE SCREWDRIVER. 8.INSERT TERMINAL B OF THE JUMPER HARNESS INTO THE IGNITION SWITCH CONNECTOR, MAKING SURE THE LOCKING TAB SEATS SECURELY, THEN INSET THE ORANGE WIRE TERMINAL PREVIOUSLY REMOVED INTO THE TAB END OF THE CONNECTOR FURNISHED WITH THE JUMPER. INSERT TERMINAL C OF THE JUMPER HARNESS INTO THE OTHER END OF THE CONNECTOR, AND MAKE SURE BOTH ENDS ARE SEATED FIRMLY. 9.REINSTALL IGNITION SWITCH CONNECTOR. TAPE BROWN/WHITE WIRE IN A LOOP, THEN TAPE TO I.P. HARNESS. DO NOT REMOVE ANY LENGTH FROM THIS WIRE. 10.REINSTALL ALL REMOVED PARTS BY REVERSING ABOVE PROCEDURE. WARRANTY INFORMATION: LABOR OPERATION NUMBER T3034 V.I.N. BREAKPOINTS: TIME ALLOWANCE .7 HOUR FAIRFAX 1G2AR69N5BX104557 TROUBLE CODE 29 OSHAWA 2G2AN37N1B1706740

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.