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Windshield Wiper Test 1A - Identifying Windshield Wiper System Problems

NOTE: Perform SYMPTOM ID TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION  . For wiring diagrams, refer to WIRING DIAGRAMS  . Refer to WIPER/WASHER SYSTEM article. After each repair, perform TEST VER-1A  .
CAUTION: Always turn ignition switch to OFF position prior to disconnecting any module connector. Ensure all connectors are clean and tight.
  1. Using scan tool, select BODY SYSTEM, then BODY COMPUTER. If scan tool displays BUS OPERATIONAL, go to next step. If scan tool displays NO RESPONSE, go to VEHICLE COMMUNICATIONS TEST 4A  . If scan tool displays any other message, go to VEHICLE COMMUNICATIONS TEST 1A  .
  2. Using scan tool, read and record all diagnostic trouble code messages. Identify problems(s) listed in WINDSHIELD WIPER DIAGNOSTIC TEST DIRECTORY and perform indicated test(s).
WINDSHIELD WIPER DIAGNOSTIC TEST DIRECTORY

Problem Perform
Scan Tool Message
WIPER RELAY CIRCUIT OPEN WINDSHIELD WIPER TEST 2A 
WIPER RELAY CIRCUIT SHORTED WINDSHIELD WIPER TEST 3A 
WIPER PARK SWITCH FAILURE WINDSHIELD WIPER TEST 4A 
Intermittent Wipers Inoperative WINDSHIELD WIPER TEST 5A 
Wiper Speed Sensitive Feature Inoperative WINDSHIELD WIPER TEST 6A 
Wiper Does Not Work After Wash Button Is Pressed WINDSHIELD WIPER TEST 7A