For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Wiper/Washer Schematics Connector End View Reference: Wiper/Washer Connector End Views
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle
2 |

1. Turn the ignition switch ON.
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 harness connector of the windshield wiper motor.
3. Turn the ignition ON, with the engine OFF.
4. Connect a test lamp from the low speed circuit to the ground circuit of the windshield wiper motor.
5. Press the windshield washer switch.

Does the test lamp illuminate?

Go to Step 10

Go to Step 4

4 |

1. Connect a test lamp from the low speed circuit of the windshield wiper motor to a good ground.
2. Press the windshield washer switch.

Does the test lamp illuminate?

Go to Step 13

Go to Step 5

5 |

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

Does the test lamp illuminate?

Go to Step 12

Go to Step 6

6 |

1. Turn OFF the ignition.
2. Reconnect the harness connector of the windshield wiper/washer switch.
3. Disconnect the harness connector of the windshield wiper/washer switch at the body control module (BCM).
4. Turn the ignition ON, with the engine OFF.
5. Connect a test lamp from the windshield wiper/washer signal circuit to a good ground.
6. Operate the windshield wiper/washer switch.

Does the test lamp illuminate?

Go to Step 7

Go to Step 11

7 |

1. Turn OFF the ignition.
2. Reconnect the harness connector of the windshield wiper/washer switch at the BCM.
3. Disconnect the harness connector C3 of the BCM.
4. Connect a test lamp from the signal circuit of the windshield washer pump at harness connector C3 of the BCM to a good ground.
5. Operate the windshield wiper/washer switch.

Does the test lamp illuminate?

Go to Step 8

Go to Step 9

8 | Test the following circuits for an open or a short to ground:

• | The supply voltage circuit for a short to ground.

• | The control circuit of the windshield washer pump for a short to ground.

Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 17

Go to Step 9

9 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 17 | Go to Step 16
10 | Inspect for poor connections at the harness connector of the windshield wiper motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 17 | Go to Step 14
11 | Inspect for poor connections at the harness connector of the windshield wiper/washer switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 17 | Go to Step 15
12 | Repair the short to ground or an open of the accessory voltage circuit at the wiper/washer switch. Refer to Circuit Testing or Wiring Repairs . Did you complete the repair? | Go to Step 17 | --
13 | Repair an open or high resistance in the ground circuit of the windshield wiper motor. Refer to Wiring Repairs or Connector Repairs . Did you complete the repair? | Go to Step 17 | --
14 | Replace the windshield wiper motor. Refer to Windshield Wiper Motor Replacement . Did you complete the replacement? | Go to Step 17 | --
15 | Replace the windshield wiper/washer switch. Refer to Windshield Wiper and Washer Switch Replacement . Did you complete the replacement? | Go to Step 17 | --
16 | Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 17 | --
17 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3