Identifying Windshield Wiper System Problems
NOTE:
Perform SYMPTOM ID TEST 1A before proceeding with this test. For connector terminal identification and wiring diagrams, see
BODY CONTROL COMPUTER - INTRODUCTION article. Perform VERIFICATION TEST: VER-2A after each repair.
CAUTION:
Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
Turn ignition on and verify operation of windshield wipers. Operate windshield wiper system in high speed mode, low speed mode, intermittent mode and wash mode (with wipers off). Using scan tool, check DTC's. See WINDSHIELD WIPER SYSTEM DTC DIRECTORY table. If wiper system does not operate properly, perform indicated test. See WINDSHIELD WIPER SYSTEM DIAGNOSTIC TEST DIRECTORY table.
WINDSHIELD WIPER SYSTEM DTC DIRECTORY
| Fault Message | Perform |
|---|---|
| Wiper ON/OFF Relay Control Open Or Short Circuit | TEST 2A |
| Wiper Park Switch Failure | TEST 3A |
| Wiper ON/OFF Relay Control Circuit Short High | TEST 4A |
WINDSHIELD WIPER SYSTEM DIAGNOSTIC TEST DIRECTORY
| Problem | Perform |
|---|---|
| Wipers Not Working At All | TEST 5A |
| Wipers Not Working In High Speed Mode | TEST 6A |
| Wipers Not Working In Low Speed Mode | TEST 7A |
| Wipers Not Working In Intermittent Mode | TEST 8A |
| Wipers Not Parking In Off Position | TEST 3A |
| Wash Function Not Operating | TEST 9A |
| Wipers Operate in High Speed Only | TEST 10A |
| Wiper Run Constantly With Ignition OFF | TEST 11A |