‘How do I fix my car’s headlight plug?’

The Car Doc weighs in.

2010 GMC Acadia SLT.
2010 GMC Acadia SLT. –GMC

Boston.com Cars is your go-to resource for coverage of local car news, events, and reviews. In the market for a car or truck? Check out our new car specials and used car specials curated by our local dealer network.

Q. The left headlight went out on my 2010 GMC Acadia. When I went to replace the bulb, I found the connector that plugs into it was melted. I cleaned up the melted plastic and got it to work, but how should the plug be fixed? Do I really need to replace the wiring harness, or can I cut off the connector and wire on a new one?


A. Melted headlight connectors are fairly common on many General Motors vehicles. The preferred repair is to cut off the connector and splice on a new connector using a special crimp sleeve, then finish the job with heat shrink tubing to weather-proof the repair. I would also replace the bulb on the opposite side since they live for a similar amount of time. The other bulb will likely burn out soon anyway.  

John Paul is AAA Northeast’s Car Doctor. He has over 40 years experience in the automotive business and is an ASE certified master technician. He answers readers’ questions each Saturday. You can tune in to his radio program Saturday morning from 8:30-10 a.m. on 950AM WROL or www.wrolradio.com. Email your car question to jpaul@aaanortheast.com. Follow John on Twitter @johnfpaul and friend him on Facebook mrjohnfpaul.

Boston.com Dealer Specials: