REVISION TO WINDSHIELD WIPER INFORMATION-DIAGNOSTIC CHARTS

MODELS: 1984 CABALLERO

This bulletin revises the information and diag nostic charts, as described and shown, in Section 8 of the Chevrolet Service Manual, ST-384-84.

PERMANENT MAGNET (PM) TWO-SPEED WIPER SYSTEM

A new twospeed permanent magnet windshield wiper motor is used as standard equipment on all Caballeros. The new wiper motor has an integral flex-vane washer motor mounted in the cover assembly.

WIPER AND WASHER OPERATION

To operate the new two-speed wiper motor, move the multi function lever to the low or high speed position. This completes the respective brush circuit to 12V (+) at the multi-function lever and allows the wiper motor to run at that speed. When the wash button is depressed, washer fluid is sprayed onto the windshield until the button is released. For diagnosis of problems in the system, refer to the new wiperwasher motor diagnosis chart, Figure No. 3, attached to this bulletin. The new chart replaces those in the existing manual.

WIPER MOTOR

Check for motor operation before removing from vehicle. Disconnect all wiring from wiper and using a jumper, perform the checks outlined in Section 8 of the Service Manual.

WASHER PUMP

Check for washer pump operation before removing from vehicle. Remove cover harness connector and apply 12V(+) to #6 and #2 terminals as shown in the attached Figure No. 1 (Washer Pump On Vehicle Check).

The following illustrations have been revised in the Service Manual and are to be replaced with the attached illustrations:

Wiper/Washer Multi-Function Lever Chick is replaced with attached Figure No. 2.

Wiper/Washer Motor Diagnostic Chart is replaced with attached Figure No. 3.

Pulse Wiper/Washer Multi-Function Lever is to be replaced with attached Figure No. 4.

Pulse Wiper/Washer Motor Diagnostic Chart is replaced with attached Figure No. 5.

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.