SERVICE MANUAL UPDATE SEAT BELT WARNING SYSTEM

MODELS/YEARS 1988-89 CUTLASS SUPREME

The following information is to replace the information concerning safety beit warning system operation in the 1988 and 1989 Cutiass Supreme service manuals.

To diagnose a condition involving the tone alarm or reminder light, refer to the attached revision of pages, 8A-76-1 and 2 of your 1988 Service Manual and Page 8A-76-2 of your 1989 Service Manual.

WARNING

S AND ALARMS

TROUBLESHOOTING HINTS

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.

Go to System Check for a guide to normal operation.

Go to System Diagnosis for diagnostic tests.

SYSTEM CHECK

Use the System Diagnosis for a list of symptoms and diagnostic steps.

SYSTEM CHECK

ACTION NORMAL RESULT

Sit in driver's seat and Fasten Belts alarm close driver's door sounds Turn Ignition Switch FASTEN BELTS to RUN Indicator lights in the Instrument Cluster Do not buckle Alarm stops after 4 safety belt to 8 seconds

Repeat previous steps No alarm sounds, but buckle safety belt and indicator goes out when belt is buckled With the key still in Key In Ignition the Ignition, open alarm sounds LH door

Remove key from Alarm stops the Ignition

With Key removed Lights-On alarm from Ignition, turnn sounds Light Switch to PARK

Turn Light Switch Alarm stops OFF

Refer to System Diagnosis when a result is not normal.

SYSTEM DIAGNOSIS

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

Tests follow the Symptom Table.

SYMPTOM TABLE

SYMPTOM DO TEST

None of the alarms A. Chime Module operate Test

Only Key In Ignition B. Key in Ignition alarm does not Input Test operate Key In Ignition B. Key In Ignition alarm operates when Input Test it should not

Fasten Belts alarm C. Fasten Belts does not operate Input Test

Fasten Belts alarm C. Fasten Belts operates when safety Input Test belt is buckled

FASTEN BELTS D. FASTEN BELTS Indicator does not Indicator Test operate, but Fasten Behs alarm operates

FASTEN BELTS D. FASTEN BELTS Indicator is always Indicator Test on, but the alarm operates properly

Only Lights-On E. Lights-On Input alarm does not Test operate

Lights-On E. Lights-On Input alarm operates when Test should not

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.