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4. Disconnect the windshield wiper motor connector. 5. Connect a test lamp between the low speed control circuit and the ground circuit. 6. The test lamp should illuminate with the windshield wiper switch in the Low speed position. If the test lamp does not illuminate test the wiper motor low speed circuit and 7. If all the circuits test normal replace the windshield wiper motor. High Speed Wipers Inoperative 1. Operate the wiper switch to the High speed position. 2. With the ignition on verify that the Front Wipers Active parameter in the BCM inputs data list is On. If the Front Wipers Active parameter is not On perform the windshield wiper washer 3. Disconnect the windshield wiper motor connector. 4. Verify that a test lamp will illuminate when connected between the high speed control circuit and the ground circuit. If the test lamp does not illuminate test the wiper motor high speed circuit for an 5. If all the circuits test normal replace the windshield wiper motor. Low Speed Wipers Always On 1. Ignition ON, verify that the Wiper Relay Command parameter on the BCM outputs data list is Off. If the scan tool displays On test the windshield wiper switch signal 1 circuit for a short 2. Verify that the Front Wipers Active parameter on the BCM inputs data list is Off. If the scan tool displays On test the wiper relay control circuit for a short to voltage. If 3. Verify that the wipers stop when the ON/OFF WPR relay is removed. If the wipers remain on test the windshield wiper motor low speed control circuit for a
2007 Hummer H3 2007 ACCESSORIES & EQUIPMENT Wipers and Washers - H3
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