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For 1990-2009 cars only
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Object Number: 1239507 Size: MF
Master Electrical Component List
Wiper Switches and Washer Pump

Circuit Description

The body control module (BCM) monitors the rear window washer pump control circuit 392. When a rear windshield wash is requested for more than two minutes, circuit 392 at battery voltage, the BCM will turn OFF the windshield washer fluid pump motor if the rear wiper is NOT requested by the windshield wiper washer switch.

Power for the windshield washer fluid pump is supplied through the front wiper fuse and windshield wiper washer switch. Grounding for the windshield washer fluid pump is through the OFF position of the windshield washer fluid pump.

Conditions for Running the DTC

Ignition is in RUN or ACC position.

Conditions for Setting the DTC

Rear window washer pump control circuit 392 at battery voltage for two minutes.

Actions Taken When the DTC Sets

No light will illuminate in I/P.

Conditions for Clearing the DTC
    • A current DTC clears when the fault is no longer present.
    • A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the fault.

Diagnostic Aids
    • Inspect wiring harness for damage. Check for broken or chaffed insulation.
    • If fault is suspected to be intermittent, wiggling harness wiring may help in locating fault.

Step

Action

Yes

No

Connector End View Reference: Master Electrical Component List in Wiring Systems

1

Did you perform the Wiper/Washer Diagnostic System Check for the system exhibiting the symptom?

Go to Step 2

Go to Diagnostic System Check - Wiper/Washer

2
  1. Turn ON the ignition, with the engine OFF.
  2. With a scan tool, observe the rear washer motor input in the body control module (BCM) wiper/washer data list, while cycling the rear washer switch.

Does the scan tool indicate correct washer pump status, ON/OFF?

Refer to Diagnostic Aids

Go to Step 3

3
  1. Turn OFF the ignition.
  2. Disconnect the windshield wiper washer switch.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the rear washer motor input.

Does the scan tool indicate switch is OFF?

Go to Step 4

Go to Step 5

4

Using a fused jumper, jumper the windshield wiper washer switch power circuit to the front washer switch circuit and jumper the rear window washer switch circuit to the windshield wiper washer switch ground circuit at the wiper switch harness connector.

Does the washer pump motor run?

Go to Step 7

Go to Step 6

5
  1. Turn OFF the ignition.
  2. Disconnect the BCM connector C2.
  3. Turn ON the ignition, with the engine OFF.
  4. Test the front washer switch circuit and the rear washer switch circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 9

Go to Step 8

6

Repair an open in the rear window washer switch circuit or the windshield wiper washer switch ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 9

--

7

Replace the windshield wiper washer switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column.

Did you complete the replacement?

Go to Step 9

--

8

Important: Perform the programming or set up procedure for the replaced control module if required.

Replace the BCM. Refer to Body Control Module Replacement in Body Control System for applicable replacement procedure.

Did you complete the replacement?

Go to Step 9

--

9
  1. Use the scan tool to clear the DTCs.
  2. Operate the vehicle within the conditions for running the DTC as specified in the supporting text.

Does the DTC reset?

Go to Step 2

System OK