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Windshield Wiper Test 1A - Identifying Windshield Wiper System Problems

NOTE: Perform SYMPTOM ID TEST 1A  before proceeding. For connector terminal ID, see CONNECTOR IDENTIFICATION  and WIRING DIAGRAM. See WIPER/WASHER SYSTEM article. Perform TEST VER-1A  after each repair.
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 TEST 3A  under VEHICLE COMMUNICATIONS. If scan tool displays any other message, go to TEST 1A  under VEHICLE COMMUNICATIONS.
  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 
Speed Sensitive Feature Inoperative WINDSHIELD WIPER TEST 6A 
Wiper Inoperative After Wash Button Used WINDSHIELD WIPER TEST 7A