For 1990-2009 cars

# SMU - SECTION 8A - REVISED ELECTRICAL DIAGNOSIS

#### SUBJECT: SERVICE MANUAL UPDATE - SECTION 8A - REVISED ELECTRICAL DIAGNOSIS, SCHEMATICS, DTC TABLE FOR INSTRUMENT PANEL: GAGES CLUSTER (UH8)

#### MODELS: 1994 OLDSMOBILE EIGHTY EIGHT, NINETY EIGHT

THIS BULLETIN CONTAINS REVISIONS AND ADDITIONS TO SECTION 8A-81 TO COVER ELECTRICAL DIAGNOSIS. A MORE DETAILED SCHEMATIC AND ELECTRICAL DIAGNOSIS FOR THE PRND321 INPUT CIRCUITS TO THE INSTRUMENT PANEL CLUSTER (IPC) ARE INCLUDED IN THESE ADDITIONS.

IN ADDITION, A DIAGNOSTIC TROUBLE CODE (DTC) TABLE IS INCLUDED TO LINK A DTC TYPE FAILURE TO THE APPROPRIATE DIAGNOSTIC TEST.

THE FOLLOWING PAGES ARE REVISIONS AND ADDITIONS TO THE SERVICE MANUAL, (SEE ATTACHMENTS).

8A-81-3 REVISION 8A-81-5 REVISION 8A-81-6 REVISION 8A-81-6A ADDITION 8A-81-7 REVISION 8A-81-8A ADDITION 8A-81-12 REVISION 8A-81-20A ADDITION 8A-81-20B ADDITION

FIGURES: 0 ATTACHMENTS: 9

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 1994 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.