CAMPAIGN: HEADLAMP CIRCUIT BREAKER OVERLOAD

Models: 1987 Pontiac Bonneville with SE Option (Includes Foglamps)

General Motors of Canada Limited has determined that a defect which relates to motor vehicle safety exists in some 1987 Pontiac Bonnevilles when equipped with foglamps. The headlamp circuit breaker may overheat at low beam resulting in an intermittent headlamp circuit. An intermittent circuit could cause the headlamps and foglamps to suddenly go out. Sudden loss of the headlamps under severe weather or nighttime driving conditions, could reduce driver visibility, which might result in a vehicle crash, without prior warning.

To prevent this condition, Dealers are required to revise wiring for the forward lamp circuit on suspect vehicles, per the Vehicles Involved and Technical Procedure sections of this bulletin.

VEHICLES INVOLVED:

Involved are certain 1987 Pontiac Bonneville models with foglamps, within the following VIN breakpoints:

Model Year Plant Beginning Up To & Including ---- ----- --------- ----------------- 1987 Willow Run HW200003 HW240535

All affected vehicles have been identified by the VIN listing provided to involved Dealers with this bulletin. Any Dealer not receiving a listing was not shipped any of the affected vehicles.

DEALER CAMPAIGN RESPONSIBILITY:

Dealers are to service all vehicles subject to this campaign at no charge to owners, regardless of mileage, age of vehicle, or ownership, from this time forward.

Whenever a vehicle subject to this campaign is taken into your new or used vehicle inventory, or it is in your Dealership for service in the future, you should take the steps necessary to be sure the campaign correction has been made before reselling or releasing the vehicle.

Owners of vehicles recently sold from your new vehicle inventory are to be contacted by the Dealer, and arrangements made to make the required modification according to instructions contained in this bulletin.

CAMPAIGN PROCEDURE:

Refer to Section 4 of the Service Policies and Procedures Manual for the detailed Procedure on handling Product Campaigns. Dealers are requested to complete the campaign on all transfers as soon as possible.

OWNER NOTIFICATION:

All owners on record at the time of campaign release are shown on the attached computer listing and have been notified by first class mail from General Motors. The listings provided are for campaign activity only and should not be used for any other purpose.

PARTS INFORMATION:

Parts required to complete this modification should be ordered through regular channels, as follows:

Description Part Number Quantity Per Vehicle ----------- ----------- -------------------- 20 Amp Fuse 12004009 1

10" of 14 AWG Gauge Wire NPN 1 Local*

3M Scotchlok 972 NPN 1 Self Stripping Local* Auto Fuse Holder (Wire range 18-14 AWG)

3M Scotchlok 953 NPN 1 Female T-Tap Quick Local* Slide Terminal (Wire Size 12 AWG)

3M Scotchlok NPN 1 Fully Insulated Male Local* Disconnect Terminal (Wire range 16-14 AWG)

*Local: Available at automotive parts and supplies stores.

PARTS AND LABOUR CLAIM INFORMATION:

Credit for the campaign work performed will be paid upon receipt of a properly completed campaign claim card, RAPID terminal or DCS transmission in accordance with the following:

Repair Code Description Time Allowance ----------- ----------- -------------- 2A Revise Forward Lamp Circuit .8

Time allowance includes 0.1 hour for Dealer administrative detail associated with this campaign. Parts credit will be based on Dealer net plus 30% to cover parts handling.

SERVICE PROCEDURE:

1. Disconnect positive battery cable at battery.

2. Remove right side hush panel and glove box.

3. Locate foglamp relay and horn relay (see Figures 1 and 2).

4. Cut tan wire to Pin D of the foglamp relay (see Figure 3). Cut back approximately 4 inches from relay. Install relay end of tan wire into self stripping 3M Fuse Holder.

5. Tape unused (hot) end of tan wire and secure to harness to prevent rattling and potential short circuit.

6. Remove convenience centre from metal bracket and locate red battery feed wire to horn relay Pin A (see Figure 5). Centre splice 3M T-Tap Quick Slide terminal onto red battery feed wire to horn relay Pin A.

7. Using a piece of #14 gauge wire 10" long, strip one end and install into 3M male terminal. Install male terminal to centre spliced T-Tap. Install other end of wire into self stripping Fuse Holder.

8. Reinstall convenience centre.

9. Plug 20 amp #12004009 auto fuse into 3M self stripping Fuse Holder and tape down to prevent rattling.

10. Reassemble glove box and right side hush panel.

11. Reconnect battery cable and check for proper operation of headlights, foglamps, and horns.

12. Install Campaign Identification Label per the instructions contained in this bulletin.

INSTALLATION OF CAMPAIGN IDENTIFICATION LABEL

Clean surface of radiator upper mounting panel and apply a Campaign Identification Label. Make sure the correct campaign number is inserted on the label. This will indicate that the campaign has been completed.

General Motors of Canada bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these 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 your General Motors Dealer for information on whether your vehicle may benefit from the information.

Dear General Motors Customer:

General Motors of Canada Limited has determined that a defect which relates to motor vehicle safety exists in some 1987 Pontiac Bonnevilles equipped with foglamps. The headlamp circuit breaker may overheat on low beam resulting in an intermittent headlamp circuit. An intermittent circuit could cause the headlamps and foglamps to suddenly go out. Sudden loss of the headlamps under severe weather or nighttime driving conditions could reduce driver visibility, which might result in a vehicle crash without prior warning.

To prevent the possibitity of this condition occurring, please discontinue use of the foglamps until a service date can be arranged through your GM Dealer. Your Dealer will revise the foglamp circuit. This service will be completed at no charge to you.

Instructions have been sent to your GM Dealer. The labor time to perform this modification is approximately 45 minutes. Please ask you Dealer if you wish to know how much additional time will be needed to process your vehicle.

This letter identifies your vehicle. Presentation of this letter to your Dealer will assist their Service personnel in completing the necessary correction to your vehicle in the shortest possible time.

Further assistance, if required, may be obtained from the General Motors Zone Office nearest you. Your vehicle Owner's Manual provides the location and phone number of each respective Zone Office.

We are sorry to cause you this inconvenience; however, we have taken this action in the interest of your continued satisfaction with our products.

Technical Services Department General Motors of Canada Limited

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.