Wipers Inoperative - All Modes

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.

Step	Action	Yes	No
Schematic Reference: Wiper/Washer System Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2	Turn the ignition to the ON position. Attempt to operate the wipers in each mode. Are the wipers inoperative in all modes?	Go to Step 3	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
3	Disconnect the windshield wiper motor. Using a test lamp connected to ground, probe the windshield wiper motor low speed circuit. Turn the ignition to the ON position. Turn the windshield wipers to a low speed. Does the test lamp illuminate?	Go to Step 4	Go to Step 5
4	Test for a poor connection or an open in the ground circuit of the windshield wiper motor. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 16	Go to Step 11
5	Connect the windshield wiper motor. Remove the WPR2 relay from the underhood fuse block. Using a test lamp connected to battery positive voltage, probe the WPR2 relay switched input circuit. Turn the wiper switch OFF. Turn the ignition to the OFF position. Does the test lamp illuminate?	Go to Step 9	Go to Step 6
6	Remove the WPR1 relay. Using a test lamp connected to battery positive voltage, probe the ground circuit of the WPR1 relay. Does the test lamp illuminate?	Go to Step 7	Go to Step 12
7	Using a test lamp connected to ground, probe the FRT WPR fuse circuit of the WPR1 relay. Does the test lamp illuminate?	Go to Step 8	Go to Step 13
8	Replace the WPR1 relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Do the windshield wipers operate normally?	Go to Step 16	Go to Step 13
9	Disconnect the windshield wiper/washer switch. Install a jumper between the ground circuit and the windshield wiper switch low signal circuit at the windshield wiper/washer switch connector. Turn the ignition to the ON position. Do the windshield wipers operate normally?	Go to Step 14	Go to Step 10
10	Test for a poor connection or an open in the ground circuit of the windshield wiper/washer switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 16	Go to Step 15
11	Replace the windshield wiper motor. Refer to Wiper Motor Replacement . Did you complete the replacement?	Go to Step 16	-
12	Repair a poor connection or an open in the ground circuit of the WPR1 relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 16	-
13	Replace the underhood fuse block. Refer to Underhood Electrical Center or Junction Block Replacement in Wiring Systems. Did you complete the replacement?	Go to Step 16	-
14	Replace the windshield wiper/washer switch. Refer to Multifunction, Turn Signal Switch Replacement in Steering Wheel and Column. Did you complete the replacement?	Go to Step 16	-
15	Replace the body control module (BCM). Refer to Control Module References in Computer/Integrating Systems 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