Diagnostic Procedure
FRONT WIPER HI/LO RELAY OPEN-IPM SYMPTOM CHART
| TEST | ACTION | APPLICABILITY |
|---|---|---|
| 1 | Turn the ignition off. Remove the Wiper On/Off Relay from the IPM. Using a 12-volt test light connected to ground, probe both Fused B(+) circuits in the IPM.
NOTE:
The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery. Does the test light illuminate brightly at each terminal? Yes --> Go To 2 No --> Repair the Fused B(+) circuit for an open. Perform BODY VERIFICATION TEST - VER 1 . |
All |
| 2 | Install a substitute relay in place of the Wiper On/Off Relay. Turn the ignition on. Turn the wipers on. Does the system operate correctly? Yes --> Replace the Wiper On/Off Relay. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 3 |
All |
| 3 | Turn the ignition off. Remove the wiper High/Low Relay from the IPM. Remove the wiper On/Off Relay from the IPM. Measure the resistance of the Common Relay circuit between the High/Low Relay and the On/Off relay in the IPM. Is the resistance below 10.0 ohms? Yes --> Go To 4 No --> Repair the Common Relay circuit for an open. Perform BODY VERIFICATION TEST - VER 1 . |
All |
| 4 | Install a substitute relay in place of the Wiper Hi/Low Relay. Turn the ignition on. Turn the wipers on. Does the system operate correctly? Yes --> Replace the Wiper Hi/Low Relay. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 5 |
All |
| 5 | Turn the ignition off. Remove the Wiper Hi/Low Relay from the IPM. Disconnect the IPM C8 harness connector. Connect a jumper wire between the Wiper Hi/Low Relay Control circuit at the IPM connector to ground. Measure the resistance between ground and the Wiper Hi/Low Relay Control circuit. Is the resistance below 5.0 ohms? Yes --> Replace the Integrated Power Module. Perform BODY VERIFICATION TEST - VER 1 . No --> Repair the Wiper Hi/Low Relay Control circuit for an open. Perform BODY VERIFICATION TEST - VER 1 . |
All |