GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2009 🢒 SLS 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Wipers Inoperative - All Modes

Diagnostic Aids

If the wiper module 30A fuse is open, a short to ground in either one of the following circuits may be the cause:

    • Accessory voltage circuit to the wiper module
    • Windshield washer pump control circuit

If the wiper module 7.5A fuse is open, a short to ground in any one of the following circuits may be the cause:

    • Accessory voltage circuit to the switch
    • Windshield washer pump control circuit
    • Windshield wiper motor high speed circuit
    • Windshield wiper switch signal 1 circuit
    • Windshield wiper switch signal 2 circuit
    • Windshield wiper switch ON signal circuit

Step

Action

Yes

No

Schematic Reference: Wiper/Washer Schematics

Connector End View Reference: Wiper/Washer Connector End Views

1

Have you conducted Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2
  1. Turn ON the ignition, with the engine OFF.
  2. Operate the windshield wiper/washer switch through all the switch positions.

Does the windshield wiper/washer system operate normally?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3
  1. Turn OFF the ignition.
  2. Disconnect the windshield wiper/washer module harness connector.
  3. Turn ON the ignition, with the engine OFF.
  4. Connect a test lamp from the accessory voltage circuit of the windshield wiper/washer module connector to a good ground.

Does the test light illuminate?

Go to Step 4

Go to Step 9

4

Connect a test lamp between the accessory voltage circuit of the wiper/washer module connector and the good ground circuit of the wiper/washer module connector.

Does the test light illuminate?

Go to Step 5

Go to Step 10

5
  1. Connect a test lamp from the windshield wiper switch signal 2 circuit of the windshield wiper/washer module connector to a good ground.
  2. Press the windshield washer switch.

Does the test light illuminate?

Go to Step 7

Go to Step 6

6
  1. Turn OFF the ignition.
  2. Disconnect the windshield wiper/washer switch harness connector
  3. Turn ON the ignition, with the engine OFF.
  4. Connect a test lamp from the battery positive voltage circuit of the windshield wiper/washer switch to a good ground.

Does the test light illuminate?

Go to Step 8

Go to Step 11

7

Check for poor connections at the harness connector of the windshield wiper/washer module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Do you find and correct the condition?

Go to Step 14

Go to Step 12

8

Check for poor connections at the harness connector of the windshield wiper/washer switch. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs .

Do you find and correct the condition?

Go to Step 14

Go to Step 13

9

Repair the short to ground or open in the accessory voltage circuit of the windshield wiper/washer module. Refer to Wiring Repairs or Connector Repairs .

Is the trouble corrected?

Go to Step 14

--

10

Repair the high resistance or open in the ground circuit of the windshield wiper/washer module. Refer to Wiring Repairs or Connector Repairs .

Is the trouble corrected?

Go to Step 14

--

11

Repair the short to ground or open in the battery positive voltage circuit of the windshield wiper/washer switch. Refer to Wiring Repairs or Connector Repairs .

Is the trouble corrected?

Go to Step 14

--

12

Replace the windshield wiper/washer module. Refer to Windshield Wiper Motor Replacement .

Have you finished the replacement?

Go to Step 14

--

13

Replace the windshield wiper/washer switch. Refer to Turn Signal Multifunction Switch Replacement .

Have you finished the replacement?

Go to Step 14

--

14

Operate the system to verify the repair.

Is the failure removed?

System OK

Go to Step 2