ANTILOCK WARNING LIGHT AND IF EQUIPPED, TRACTION OFF WARNING. Buick Park Avenue 1995

REVISION: 04/23/96

THIS BULLETIN IS BEING REVISED TO UPDATE THE SUBJECT (ADDED - DTC 61 SET). THIS REVISION IS FOR CD-ROM AND TAS UPDATE ONLY - PAPER COPY OF BULLETIN WILL NOT BE REPRINTED. **********************************************************************

SUBJECT: AMBER ANTILOCK WARNING LIGHT AND (IF EQUIPPED) AMBER TRACTION OFF WARNING LIGHT STAYS ON, DTC 61 SET (APPLY SEALANT/GREASE)

MODELS: 1995 BUICK LESABRE, PARK AVENUE 1995 OLDSMOBILE NINETY EIGHT, EIGHTY EIGHT 1995 PONTIAC BONNEVILLE BUILT PRIOR TO JUNE 1, 1995

CONDITION:

SOME OWNERS MAY COMMENT THAT THE AMBER ANTILOCK WARNING LIGHT AND (IF EQUIPPED) AMBER TRACTION OFF WARNING LIGHT STAYS ON. ALSO, THE ANTILOCK BRAKE SYSTEM AND (IF EQUIPPED) TRACTION CONTROL SYSTEM MAY BECOME INOPERATIVE. THE FOLLOWING CONDITIONS WILL OCCUR:

- AMBER ANTILOCK WARNING LIGHT AND (IF EQUIPPED) AMBER TRACTION OFF WARNING LIGHT TURNS ON AND STAYS ON. THE RED BRAKE WARNING LIGHT STAYS OFF.

- EBTCM DIAGNOSTIC TROUBLE CODE (DTC) 61 WILL BE SET.

IMPORTANT: THIS CONDITION IN NO WAY AFFECTS THE OPERATION OF THE POWER BRAKES.

CAUSE:

FLUIDS TRAPPED IN THE WIRE HARNESS IN THE AREA BELOW THE WINDSHIELD WASHER RESERVOIR. THIS ALLOWS THE FLUIDS TO COME IN CONTACT WITH THE GROUND SPLICE FOR THE PRESSURE MODULATOR VALVE (PMV) MOTOR (S129) AND TO BE WICKED DOWN TO THE 4-WAY BRAKE PMV CONNECTOR C2. SUFFICIENT FLUIDS IN THE CONNECTOR INTERFERE WITH THE PUMP RUN SIGNAL, CAUSING A DTC 61 TO SET. THIS CONDITION DOES NOT DAMAGE THE ELECTRONIC BRAKE TRACTION CONTROL MODULE (EBTCM).

CORRECTION:

SEAL SPLICE S129 WITH ELECTRICAL MOISTURE SEALANT, P/N 11515174. CUT SEALANT INTO APPROXIMATELY A 2" X 2" SQUARE. POSITION SEAM IN FLEXIBLE CONDUIT DOWN OR SLIT THE BOTTOM OF THE CONDUIT IN AREA OF SPLICE S129 AND APPLY ELECTRICAL CONNECTOR GREASE, P/N 12377900, TO TERMINALS IN CONNECTOR C2.

PROCEDURE:

1. REMOVE AIR CLEANER AND WINDSHIELD WASHER RESERVOIR. FOR 3800 SUPER CHARGED ENGINES, IF EQUIPPED, REMOVE THE AUTO LEVEL CONTROL AIR COMPRESSOR.

2. REMOVE FLEXIBLE CONDUIT COVERING THE MAIN HARNESS 6 INCHES IN BOTH DIRECTIONS FROM THE POINT WHERE THE WIRES BREAK OUT TO THE PMV MOTOR CONNECTOR C2 (SEE FIGURE 1).

3. LOCATE SPLICE S129 (SEE FIGURE 2) AND REMOVE THE TAPE COVERING IT. IT IS LOCATED ABOUT 2 INCHES FORWARD FROM THE POINT WHERE THE WIRES BREAK OUT OF THE WIRING HARNESS FOR THE CONNECTOR C2.

4. OPEN CONNECTOR C2.

CAUTION:

TO PREVENT PERSONAL INJURY, WEAR HEARING AND EYE PROTECTION FOR THE NEXT STEP.

USING COMPRESSED AIR AND A BLOW GUN, BLOW AIR DOWN TERMINAL E (SEE FIGURE 3) ON THE HARNESS SIDE OF CONNECTOR C2 UNTIL NO FLUID CAN BE SEEN BEING EXPELLED FROM THE WIRE AT S129. THIS WILL TAKE SEVERAL MINUTES.

5. THOROUGHLY DRY SPLICE S129 AND THE WIRES 2 INCHES IN BOTH DIRECTIONS.

6. THOROUGHLY CLEAN THE WIRES 2 INCHES IN BOTH DIRECTIONS OF SPLICE S129 WITH AN ALCOHOL WIPE (AVAILABLE LOCALLY) AND ALLOW TO COMPLETELY DRY.

7. CUT A 2" X 2" PIECE OF ELECTRICAL MOISTURE SEALANT. APPLY THE MOISTURE SEALANT PATCH TO THE SPLICE BY FOLDING IT OVER THE WIRES. MAKE SURE THAT THERE IS AT LEAST A 1/8 INCH GAP BETWEEN ANY PARALLEL WIRES TO ENSURE THAT THE PATCH CAN SEAL BETWEEN THE WIRES (SEE FIGURE 4). PRESS THE PATCH TOGETHER WITH YOUR FINGERS OR DUCK BILL PLIERS, MAKING SURE THAT THE WIRES ARE COMPLETELY SEALED.

8. RETURN THE HARNESS TO ITS ORIGINAL CONDITION, MAKING SURE THAT THE CONDUIT SEAM IN THE AREA OF THE SPLICE IS ON THE BOTTOM OF THE HARNESS OR SLIT THE BOTTOM OF THE CONDUIT AND MAKE SURE THAT ANY TAPE USED TO SECURE THE CONDUIT WILL ALLOW ANY TRAPPED FLUIDS TO DRAIN.

9. USING A BRUSH SUCH AS AN ACID BRUSH (AVAILABLE LOCALLY), THOROUGHLY COAT BOTH THE MALE AND FEMALE TERMINALS OF CONNECTOR C2 WITH THE ELECTRICAL CONNECTOR GREASE.

10. RECONNECT CONNECTOR C2 AND REASSEMBLE THE WASHER FLUID RESERVOIR, AIR CLEANER AND, IF NECESSARY, THE ELECTRONIC LEVEL CONTROL PUMP.

PARTS INFORMATION:

PARTS ARE EXPECTED TO BE AVAILABLE ON FEBRUARY 12, 1996.

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR LABOR OPERATION DESCRIPTION TIME: ========= ============ ========

N6035 WIRING AND/OR CONNECTOR - USE PUBLISHED LABOR REPAIR (ANTI-LOCK BRAKING OPERATION TIME SYSTEM)

ADD TO REMOVE AIR BOX, WASHER BOTTLE 0.4 HR AND COMPRESSOR TO ACCESS WIRE HARNESS

FIGURES: 04 ATTACHMENTS: 00

FIGURE 1: 1. PMV ASSEMBLY CONNECTOR C2

FIGURES 2: 1. AUTO LEVEL CONTROL AIR COMPRESSOR 2. WASHER FLUID BOTTLE 3. S129

FIGURE 4: 1. S129

Object Number: 93554 Size: MF

Object Number: 82639 Size: MF

Object Number: 95219 Size: SH

Object Number: 90068 Size: LF

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.