WINDSHIELD WIPER/WASHER DIAGNOSIS PROCEDURE

VEHICLES AFFECTED: 1985 Oldsmobile, Buick, and Cadillac 'C' Models

This bulletin contains diagnostic procedures and trouble trees which supplement the Service Information Manual. Refer to the chart listed below for the appropriate procedure.

Washer Pump Inoperative Procedure 1 Washer Pumps Continuously Procedure 2 Wiper Motor Inoperative Procedure 3 Intermittent Wiper Operation Procedure 4 Wiper Will Not Park Procedure 5 No Delay, Wipers Operate in 'Low' and 'High' Modes Procedure 6 Wiper Stays In Delay Mode During Wash Cycle When Started In Delay Mode Procedure 7 No Low Mode Procedure 8 No High Mode Procedure 9 Blades Cycle In and Out of Park Position When Wiper is Shut Off Procedure 10 Motor End Cover Replacesent Procedure 11

Before performing any diagnosis of the system to determine the cause of these conditions, the following two items should be checked:

A) Wiper fuse is not blown; and

B) That the wiper motor ground strap is secure and that the ground strap has continuity to the body ground.

NOTICE: When the diagnosis procedure requires wiper motor operation, the windshield and wiper blades must be cleaned to avoid damaging glass.

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.