SERVICE MANUAL UPDATE SEAT BELT WARNING SYSTEM

SEAT BELT WARNING SYSTEM OPERATION

VEHICLES AFFECTED: 1988 AND 1989 W-CAR ------------------

The following information is to replace the text concerning safety belt warning system operation in paragraphs 2 and 3 of Restraint System (Page 10- 10-1) of the 1988 and 1989 W-car Service Manuals.

"The driver's safety belt system includes a reminder lamp and tone alarm to warn the driver that the safety belt is not buckled. If the driver's safety belt is not buckled when the ignition is turned on, the tone alarm will operate for 4 to 8 seconds, and the reminder lamp will remain lit.

If the driver's safety belt is buckled when the ignition is turned on, neither the tone alarm nor reminder lamps will operate." To diagnose a condition involving the tone alarm or reminder light, refer to the attached revision of page 76-2 of Section 8A-76-2 of your 1988 and 1989 Service Manuals.

TROUBLESHOOTING HINTS

o Try the following checks before doing the System Diagnosis.

1. Check STOP Fuse by observing the Stop Lights.

2. Check INDIC Fuse by observing SERVICE ENGINE SOON Indicator with the Ignition Switch in RUN and Engine off.

3. Check TAIL Fuse by observing the Park Lights.

4. Check that grounds G103, G303 and G101 are clean and tight.

5. If the Fasten Belts Chime Reminder and FASTEN BELTS Indicator operate continuously, replace the Audio Alarm Module.

o Go to System Check for a guide to normal operation. o Go to System Diagnosis for diagnostic tests.

SYSTEM CHECK

o Use the System Diagnosis for a list of symptoms and diagnostic steps. o Refer to System Diagnosis when a result is not normal.

SYSTEM DIAGNOSIS

o Do the tests listed for your symptom in the Symptom Table below. o Tests follow the Symptom Table.

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.