For 1990-2009 cars

# CRANK (OR NO CRANK) AND NO START AND/OR NO START

#### 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

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.

COPYRIGHT 1993 CADILLAC MOTOR CAR DIVISION, GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.