INFO. REAR DEFOGGER TIME ON/TIME OUT. Buick Riviera 1997

SUBJECT: INFORMATION - REAR DEFOGGER OPERATION (TIME ON/TIME OUT)

MODELS: 1997 BUICK RIVIERA

VEHICLES BUILT PRIOR TO MARCH 1, 1997, HAVE A REAR WINDOW DEFOGGER SOLID STATE TIMER THAT "TIMES OUT" AFTER 10 MINUTES REGARDLESS OF VEHICLE SPEED. EACH TIME THE REAR DEFOGGER SWITCH IS PRESSED THEREAFTER IN THE SAME KEY CYCLE, THE TIMER RESETS TO OPERATE FOR 5 MINUTES.

VEHICLES BUILT AFTER MARCH 1, 1997, HAVE A REAR WINDOW DEFOGGER TIMER THAT HAS BEEN REPROGRAMMED. THE REAR WINDOW DEFOGGER IN THESE VEHICLES WILL OPERATE FOR APPROXIMATELY 10 MINUTES. HOWEVER, IF THE VEHICLE IS TRAVELING OVER 48 KM/H (30 MPH), THE TIMER FUNCTION IS DISABLED AND THE DEFOGGER OPERATES CONTINUOUSLY. WHEN THE VEHICLE SPEED IS LESS THAN 48 KM/H (30 MPH), THE REAR WINDOW DEFOGGER WILL "TIME OUT" AT APPROXIMATELY 10 MINUTES. EACH TIME THE REAR DEFOGGER SWITCH IS PRESSED THEREAFTER IN THE SAME KEY CYCLE, THE TIMER RESETS TO OPERATE FOR 5 MINUTES IF VEHICLE SPEED IS LESS THAN 48 KM/H (30 MPH).

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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.