View Full Version : Fifth Wheel Wiring Question

06-25-2016, 07:26 PM
I have 2015 GMC Sierra. Am hauling 2016 Montana HC. While towing, I am getting frequent alerts on Intellilink Instrument Pannel: "Check trailer wiring" which immediately changes to "Trailer Connected". I have verified that brakes continue to operate & lights continue to work even during these alerts. I have had service tech check trailer & no issues discovered.

Anyone have experience with an issue similar to this one?
Any assistance/guidance is much appreciated. Thanks!

07-01-2016, 08:02 AM
You likely have a loose connection where you plug the trailer into the truck, go to somewhere that deals with truck hitches and have that checked.

07-02-2016, 11:54 AM
If you’re not already using it try electrical contact grease in the plug and receptacle, if you have a loose pin or poor continuity it will help to make that contact, if that doesn’t work, I would plug in your truck and wiggle each bulb until you duplicate the fault, then you know which one it is…..good luck.