PARK BRAKE LIGHT INOP REPLACE HARNESS CONNECTOR

SUBJECT: INOPERATIVE PARK BRAKE TELL-TALE LIGHTS (INSTALL LOCKING CONNECTOR)

VEHICLES AFFECTED: 1984-89 C5, C6, C7 MEDIUM DUTY TRUCKS EQUIPPED W/HYDRAULIC BRAKES

1984 through 1989 C5, C6 and C7 medium trucks equipped with hydraulic brakes could experience an inoperative tell-tale light operation due to a loose terminal connection at the hand brake lever if the driver accidentally kicks the park brake switch.

To address this condition, a new self-locking connector/terminal may be installed on the brake warning tell-tale harness at the park brake switch.

Self-locking connector/terminals are targeted to be released for Production approximately March, 1989.

REMOVAL AND REPLACEMENT PROCEDURE: (Refer to Figure 1.) ------------------------------------------------------ 1. Place the ignition key in the "off" position.

2. Locate the park brake switch on the park brake lever. Unplug the terminal/connector from the switch and cut the terminal/connector off the brake warning tell-tale harness (brown wire).

3. Replace the terminal/connector with P/N 12089254 (AMP(R) P/N 2-520129-2), or equivalent. Use AMP(R), Inc. Crimping Hand Tools #58078-3 and Die #90390-3 to insure the new terminal/ connector is securely attached to the brown wire. These tools are available from your local AMP(R), Inc. distributor or can be purchased from:

AMP(R), Inc. P.O. Box 3608 Harrisburg, Pa. 17105 (717) 564-0100 - Sales Dept.

4. Plug the terminal/connector into the park brake switch male blade terminal.

"We believe this source and their equipment to be reliable. There may be additional manufacturers of such equipment. General Motors does not endorse, indicate any preference for or assume any responsibility for the products or equipment from this firm for any such items which may be available from other sources."

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.