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B166F-RIGHT TRAILER TOW LAMP CONTROL CIRCUIT LOW (CONTINUED) 3. OPEN FUSED B(+) TO RELAY Remove the Trailer Tow Relay from the PDC. Using a 12-volt test light connected to ground, check the Fused B(+) circuit at the relay connector. Does the test light illuminate? No >> Replace the Power Distribution Center. Perform BODY VERIFICATION TEST - VER 1. Yes >> Go To 4 4. RIGHT TRAILER TOW RELAY Install a known good relay in place of the Trailer Tow Relay. With the scan tool erase DTC’s Cycle the ignition from on to off 3 times and leave on. With the scan tool, read DTC’s. Does the scan tool display the same DTC? No >> Replace the original Trailer Tow Relay. Perform BODY VERIFICATION TEST - VER 1. Yes >> Go To 5 5. (L656) TRAILER TOW RELAY CONTROL SHORTED Remove the Right Trailer Tow Relay. Disconnect the Front Control Module from the PDC 49 – way connec- Measure the resistance between ground and the (L656) Trailer Tow Is the resistance below 1000.0 ohms? Yes >> Replace the Power Distribution Center. Perform BODY VERIFICATION TEST - VER 1. No >> Go To 6 8L - 58 LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS ND |