GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

Schematic Reference: Wiper/Washer Schematics

Connector End View Reference: Wiper/Washer Connector End Views

DEFINITION: The DELAY mode is inoperative or operates at the ON speed, and the wiper does not park.

1

Did you review the Rear Wiper/Washer System Description and Operation and perform the necessary inspections?

--

Go to Step 2

Go to Symptoms - Wiper/Washer Systems

2

  1. Turn ON the ignition, with the engine OFF.
  2. Operate the rear wiper/washer system in all the switch positions.

Does the rear wiper/washer system operate normally?

--

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

  1. Turn OFF the ignition.
  2. Disconnect the harness connector of the rear wiper/washer module.
  3. Turn ON the ignition, with the engine OFF.
  4. Measure the voltage from the Off/Delay signal circuit of the rear wiper/washer switch to a good ground.
  5. Turn the rear wiper/washer switch to the DELAY position.

Is the voltage near the specified value?

B+

Go to Step 4

Go to Step 6

4

  1. Turn OFF the ignition.
  2. Turn the rear wiper/washer switch to the OFF position.
  3. Connect the harness connector of the rear wiper/washer module.
  4. Disconnect the harness connector of the rear wiper motor.
  5. Turn ON the ignition, with the engine OFF.
  6. Measure the voltage from the 12 V reference circuit of the rear wiper motor park switch to a good ground.

Does the test lamp illuminate?

B+

Go to Step 5

Go to Step 7

5

Measure the resistance of the rear wiper motor park switch from the 12 V reference circuit to the signal circuit of the rear wiper motor park switch.

0-5 ohms

Go to Step 8

Go to Step 11

6

Test the off/delay signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 15

Go to Step 9

7

Test the 12 V reference circuit of the rear wiper motor park switch for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 15

Go to Step 10

8

Test the signal circuit of the rear wiper motor park switch for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 15

Go to Step 10

9

Inspect for poor connections at the harness connector of the rear wiper/washer switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 15

Go to Step 12

10

Inspect for poor connections at the harness connector of the rear wiper/washer module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 15

Go to Step 13

11

Inspect for poor connections at the harness connector of the rear wiper motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 15

Go to Step 14

12

Replace the rear wiper/washer switch. Refer to Accessory Switch Replacement in Instrument Panel, Gages, and Console.

Did you complete the replacement?

--

Go to Step 15

--

13

Replace the rear wiper/washer module. Refer to Windshield Wiper System Module Replacement .

Did you complete the replacement?

--

Go to Step 15

--

14

Replace the rear wiper motor. Refer to Liftgate Wiper Motor Replacement .

Did you complete the replacement?

--

Go to Step 15

--

15

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3