Replace the wiring harness for headlight bulb on Pontiac g6?

Answer 1

I had an issue w/ mine discovered when a headlight went out. Replaced the bulb and it still didn't work. Upon further inspection, I realized that the harness had malfunctioned somehow and actually began melting the connector.

You can pick up a replacement harness from your local auto parts store, just make sure you get one that fits your bulb type (H11 is the OEM). You don't need to disconnect the battery really as there is a quick disconnect that allows you to remove the entire headlight assembly from the car (and subsequently the power) and work on it wherever you'd like.

I was a little confused when the original harness assembly had 2 black wires going to the rear of one socket opening and 1 yellow wire going to the other, because the replacement one was just 2 black wires; 1 to each side of the socket. My quick thinking wife suggested that twisting the 2 black wires from the old rig together and splicing to the new harness would probably solve this problem. She was right. All I did was twist and crimp the 2 black existing wires into one side of a butt splice connector (red, rated for 18-22 awg), and the new wire, from the replacement harness, to the other side of the butt splice connector. The remaining existing wire (yellow), simply crimped 1 to 1 w/ the other wire from the new harness.

Reinstalled the light bulb, plugged it back in to the quick connect/disconnect and tested it before putting the whole thing back in place and it came right on. What worries me is the reason that the harness melted in the first place. I'll definitely be keeping an eye out for that and if you had the same issue I did, you probably should too. Hope this helps.