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 ON the ignition, with the engine OFF.
2. Press the windshield washer switch.

Does the windshield washer pump operate?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3 |

1. Observe the Wash Switch parameter with a scan tool.
2. Press the windshield washer switch.

Does the scan tool indicate the Wash Switch is ON?

Go to Step 4

Go to Step 5

4 |

1. Disconnect the windshield washer pump connector.
2. Probe the windshield washer pump control circuit with a test lamp connected to a good ground.
3. Press the windshield washer switch.

Does the test lamp illuminate?

Go to Step 6

Go to Step 7

5 |

1. Disconnect the body control module (BCM) J2 connector.
2. Probe the windshield washer switch signal circuit with a test lamp connected to a good ground.
3. Press the windshield washer switch.

Does the test lamp illuminate?

Go to Step 12

Go to Step 8

6 | Test the windshield washer pump ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 16 | Go to Step 10
7 |

1. Disconnect the BCM J1 connector.
2. Test the windshield washer pump control circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 16

Go to Step 12

8 |

1. Disconnect the windshield washer switch.
2. Test the windshield washer switch voltage supply circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 16

Go to Step 9

9 | Test the windshield washer switch signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 16 | Go to Step 11
10 | Inspect for poor connections at the windshield washer pump. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 16 | Go to Step 13
11 | Inspect for poor connections at 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 16 | Go to Step 14
12 | Inspect for poor connections at the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 16 | Go to Step 15
13 | Replace the windshield washer pump. Refer to Washer Pump Replacement . Did you complete the replacement? | Go to Step 16 | --
14 | Replace the windshield wiper/washer switch. Refer to Turn Signal Multifunction Switch Replacement . Did you complete the replacement? | Go to Step 16 | --
15 | Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 16 | --
16 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3