Wiper Inoperative - Rear

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Step	Action	Values	Yes	No
Schematic Reference: Wiper/Washer System Schematics DEFINITION: The rear wiper motor is inoperative in one or more modes, the rear washer pump may or may not operate.
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	Turn the ignition ON. Operate the rear wiper/washer system in all the switch positions. Does the rear wiper/washer system operate normally?	-	Go to TESTING FOR INTERMITTENT AND POOR CONNECTIONS	Go to Step 3
3	Does the rear wiper motor operate when the rear washer switch is pressed?	-	Go to Step 6	Go to Step 4
4	Disconnect the rear wiper motor connector. Connect a test lamp from the rear wiper motor battery voltage supply circuit terminal in the wiper motor harness connector to a good ground. Turn the ignition ON. Does the test lamp illuminate?	-	Go to Step 5	Go to Step 9
5	Connect a test lamp from the rear wiper motor battery voltage supply circuit terminal to the ground circuit terminal in the wiper motor harness connector. Turn the ignition ON. Does the test lamp illuminate?	-	Go to Step 6	Go to Step 10
6	Disconnect the rear wiper motor connector. Connect a test lamp from the rear wiper switch signal circuit terminal in the wiper motor harness connector to ground. Turn the ignition ON. Operate the rear wiper/washer switch to the 1 position. Does the test lamp illuminate?	-	Go to Step 7	Go to Step 8
7	Disconnect the rear wiper/washer switch connector. Operate the rear wiper/washer switch to the 2 position. Measure the resistance through the rear wiper/washer switch from the accessory voltage supply circuit terminal to the rear wiper switch signal circuit terminal. Is the resistance at or near the specified value?	1000 Ω	Go to Step 14	Go to Step 12
8	Test the rear wiper switch signal circuit for an open or short to ground. Refer to CIRCUIT TESTING and WIRING REPAIRS . Did you find and correct the condition?	-	Go to Step 16	Go to Step 11
9	Repair the rear wiper motor accessory voltage supply circuit for an open or short to ground. Refer to CIRCUIT TESTING and WIRING REPAIRS . Is the repair complete?	-	Go to Step 16	-
10	Repair the rear wiper motor ground circuit for an open or high resistance. Refer to CIRCUIT TESTING and WIRING REPAIRS . Is the repair complete?	-	Go to Step 16	-
11	Test the rear wiper/washer switch accessory voltage supply circuit for an open or short to ground. Refer to CIRCUIT TESTING and WIRING REPAIRS . Did you find and correct the condition?	-	Go to Step 16	Go to Step 12
12	Inspect for poor connections at the rear wiper/washer switch. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS and CONNECTOR REPAIRS . Did you find and correct the condition?	-	Go to Step 16	Go to Step 13
13	Replace the rear wiper/washer switch. Refer to ACCESSORY SWITCH REPLACEMENT . Is the repair complete?	-	Go to Step 16	-
14	Inspect for poor connections at the rear wiper motor. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS and CONNECTOR REPAIRS . Did you find and correct the condition?	-	Go to Step 16	Go to Step 15
15	Replace the rear wiper motor. Refer to Wiper Motor Replacement - Rear . Is the repair complete?	-	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