Emergency Lights Not Working Properly On a Trailer Behind a 2005 Chevy Suburban
Question:
i have a 2005 chevy suburban with the 7 way connector the a 4 way on the trailer. everything seems to work except when i turn the emergency lights on then i only get the rh signal to work and brake but not the lh. any suggestions?
asked by: John
Expert Reply:
The first thing I would do is try to narrow down whether the wiring problem is on the vehicle or the trailer side. With the trailer not connected, use a circuit tester, like part # PTW2993, and check all the pins on the 7-way. Make sure you activate that pin function as you test it. Then plug in your adapter, and test that.
If all these items check out OK, then the problem is somewhere on your trailer. Trace the wires for the left-hand signal and brake back from the trailer connector. Look for corroded connections and pinched, broken, or frayed wires. If you are not getting a signal at the connector or adapter, check the vehicle owner manual for the location of the fuses that control the towing circuits, and make sure there aren't any that are blown.
