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.
- 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.
- 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 | |