CRUISE CONTROL MAY DROP OUT WHEN WIPERS ARE ON. Pontiac Grand Prix 1998

EVISION: 05/14/98 DIVS INVL 2 7

THIS BULLETIN IS BEING ISSUED TO ADD THE 1998 MODEL YEAR, REVISE REPAIR PROCEDURES AND LABOR TIMES. PLEASE DISCARD CORPORATE BULLETIN NUMBER 73-90-19 (SECTION 9 - ACCESSORIES) ______________________________________________________________________

SUBJECT: CRUISE CONTROL MAY DROP OUT WHEN WIPERS ARE ON (ADD SEPARATE GROUND, REPLACE MODULE)

MODELS: 1997-98 PONTIAC GRAND PRIX

CONDITION:

SOME CUSTOMERS MAY COMMENT THAT THE CRUISE CONTROL DROPS OUT, OR RELEASES BY ITSELF, WHILE DRIVING WITH THE WINDSHIELD WIPERS ON.

CAUSE:

THE CRUISE CONTROL MODULE AND THE WIPERS SHARE A COMMON GROUND. FEEDBACK FROM THE WIPER CIRCUIT CAN INTERFERE WITH THE CRUISE MODULE AND ALLOW THE CRUISE TO RELEASE. THE WIRING WAS CORRECTED IN PRODUCTION FOR THE 1998 MODEL YEAR BY USING SEPARATE GROUND WIRES. HOWEVER, FEEDBACK CAN STILL BE PRESENT IN THE MODULE. THE MODULE WAS CHANGED IN PRODUCTION IN LATE MARCH OF 1998.

CORRECTION:

FOR BOTH 1997 AND 1998 MODEL YEARS, REPLACE THE CRUISE CONTROL MODULE WITH NEW PART NUMBER 25173345, FOLLOWING THE INSTRUCTIONS IN THE SERVICE MANUAL.

FOR 1997 MODELS ONLY, INSTALL A SEPARATE GROUND WIRE FOR THE CRUISE CONTROL MODULE AND REWIRE CIRCUIT 389.

USE THE FOLLOWING PROCEDURE TO INSTALL THE REVISED WIRING:

1. REMOVE THE LEFT HAND FENDER BRACE AND THE AIR CLEANER DUCT. LOCATE THE CRUISE CONTROL MODULE, WHICH IS MOUNTED ON THE LEFT SHOCK TOWER (SHOWN IN FIGURE 11 ON PAGE 8A-201-7 OF THE SERVICE MANUAL). REMOVE THE CONNECTOR.

2. REMOVE TERMINALS "E" AND "K" FROM THE MODULE CONNNECTOR. CUT OFF THE OLD TERMINALS AND TAPE THE WIRES BACK TO THE HARNESS.

3. USE A NEW 24 INCH (600 MM) LENGTH OF BLACK 20 GAUGE (0.5 MM) WIRE. USE A NEW TERMINAL, P/N 12048074, AT ONE END, AND A RING TERMINAL AT THE OTHER. ATTACH THE RING TERMINAL TO THE TRANSAXLE GROUND STUD AND INSTALL THE NEW TERMINAL INTO CAVITY "E".

4. USE A NEW 36 INCH (900 MM) LENGTH OF GREEN 20 GAUGE (0.5 MM) WIRE AND ADD A NEW TERMINAL, P/N 12048074, AT ONE END. INSTALL THE TERMINAL INTO CAVITY "K". SPLICE THE OTHER END OF THE WIRE INTO THE WIRE FROM PCM CONNECTOR C1, TERMINAL 13, ABOUT 3 INCHES (75 MM) BACK FROM THE CONNECTOR. THE PCM IS LOCATED INSIDE THE AIR CLEANER HOUSING AND IS SHOWN ON PAGE 8A-201-9 OF THE SERVICE MANUAL.

5. TAPE THE NEW WIRE IN PLACE TO PREVENT ANY PINCH POINTS.

PARTS INFORMATION:

P/N DESCRIPTION ==================== ======================================

25173345 CRUISE CONTROL MODULE

12048074 TERMINAL

PARTS ARE EXPECTED TO BE AVAILABLE FROM GMSPO, 5/11/98.

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION LABOR OPERATION NUMBER DESCRIPTION TIME ================ ============================== ===============

N6170 CRUISE CONTROL WIRING AND/OR USE PUBLISHED CONNECTOR - REPAIR LABOR OPERATION TIME

R1220 MODULE CRUISE CONTROL - 0.3 HR REPLACE

FIGURES: 00 ATTACHMENTS: 00

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