CRANK (OR NO CRANK) AND NO START AND/OR NO START. Buick Riviera 1987

SUBJECT: CRANK (OR NO CRANK), NO START AND/OR BCM CODE 334 (REPAIR FUSIBLE LINK SPLICE)

MODELS: 1986-91 CADILLAC ELDORADOS 1986-91 CADILLAC SEVILLES 1986-93 BUICK RIVIERAS 1986-92 OLDSMOBILE TORONADOS

CONDITION:

SOME OWNERS OF 1986-1989 CADILLAC ELDORADOS AND SEVILLES, AND 1986-1993 BUICK RIVIERAS AND 1986-1992 OLDSMOBILE TORONADOS MAY EXPERIENCE A CONDITION OF A CRANK BUT NO START AND POSSIBLY A BCM CODE 334 SET; OR SOME 1990-1991 ELDORADOS, SEVILLES, AND 1986-1993 RIVIERAS OR 1986-1992 TORONADOS MAY EXPERIENCE A NO CRANK AND NO START CONDITION AND POSSIBLY A BCM CODE 334 SET. THIS CONDITION MAY BE CAUSED BY A CORRODED SPLICE ON CIRCUIT 480 AT FUSIBLE LINK B (CADILLAC) OR FUSIBLE LINK J (RIVIERA AND TORONADO), LOCATED AT THE ISO POWER JUNCTION BLOCK. REFER TO FIGURE 1.

CAUSE:

CIRCUIT 480 AND FUSIBLE LINK B OR J IS THE "HOT AT ALL TIMES" FEED TO THE ECM ON ALL MODEL YEARS. IN 1990, CIRCUIT 480 AND FUSIBLE LINK B OR J ALSO BECAME THE "HOT AT ALL TIMES" FEED TO THE PASSKEY MODULE. THIS IS THE REASON FOR THE ADDITION OF THE NO CRANK CONDITION TO THE 1990 - 1993 MODEL YEARS.

CORRECTION:

TO REPAIR THIS CONDITION REPAIR FUSIBLE LINK SPLICE AS OUTLINED IN SECTION 8A-5 OF THE SERVICE INFORMATION MANUAL.

FOR VEHICLES REPAIRED UNDER WARRANTY USE LABOR OPERATION N6270. USE PUBLISHED LABOR OPERATION TIME.

FIGURES: 1

Object Number: 81171 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.