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 ON.
2. Turn the windshield wiper/washer switch OFF.

Do the windshield wipers remain in the PARK position?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3 | Disconnect the harness connector of the windshield wiper/washer switch. Do the windshield wipers stop? | Go to Step 11 | Go to Step 4
4 | Connect a test lamp from the signal circuit of the windshield wiper/washer switch at the body control module (BCM) to a good ground. Does the test lamp illuminate? | Go to Step 9 | Go to Step 5
5 | Connect a test lamp from the supply voltage circuit of the wiper 2 relay coil to a good ground. Does the test lamp illuminate? | Go to Step 14 | Go to Step 6
6 | Connect a test lamp from the control circuit of the windshield washer pump to a good ground. Does the test lamp illuminate? | Go to Step 15 | Go to Step 7
7 | Disconnect the wiper 1 relay. Do the windshield wipers stop? | Go to Step 8 | Go to Step 16
8 | Connect a test lamp from the supply voltage circuit of the wiper 1 relay coil to a good ground. Does the test lamp illuminate? | Go to Step 10 | Go to Step 12
9 | Test the signal circuit of the windshield wiper switch for a short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 20 | Go to Step 13
10 | Test the supply voltage circuit of the wiper 1 relay for a short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 20 | 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 20 | Go to Step 17
12 | Inspect for poor connections at the wiper 1 relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 20 | Go to Step 18
13 | 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 20 | Go to Step 19
14 | Repair a short to voltage on supply voltage circuit of the wiper 2 relay coil. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 20 | --
15 | Repair a short to voltage on control circuit of the windshield washer pump. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 20 | --
16 | Repair a short to voltage on high speed circuit of the windshield wiper motor. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 20 | --
17 | Replace the windshield wiper/washer switch. Refer to Windshield Wiper and Washer Switch Replacement . Did you complete the replacement? | Go to Step 20 | --
18 | Replace the wiper 1 relay. Did you complete the replacement? | Go to Step 20 | --
19 | Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 20 | --
20 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3