trailer conected/not connected rain issues

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Feb 5, 2018 | 05:44 AM

Gwilkrrs

Thread Starter

Fleet Mechanic

Joined: Jun 2002

Posts: 1,986

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From: maryland

trailer conected/not connected rain issues

17 350 lariat 6.7 w/ 8k miles

yesterday- rain/sleeting conditions the message center kept alerting trailer connected then a bit later trailer disconnected. it went thru sort of a check list with turn signals not working too..... truck has never had a trailer connected to it yet.
I presume water intrusion- but from where? how could this be so soon?

Feb 5, 2018 | 06:19 AM

Tom N OH

More Turbo

Joined: Apr 2011

Posts: 543

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From: Extreme NW Ohio

The most likely answer is water inside the 7 way receptacle at the rear of the truck. Check to make sure the cover is closed completely. Also, get some dielectric grease & liberally coat the terminals inside the receptacle to prevent corrosion. In the past, I have had to drill a drain hole in the bottom of a receptacle or two to allow rainwater to drain away.

Feb 5, 2018 | 06:30 AM

Poncho450

Lead Driver

Joined: Oct 2014

Posts: 5,943

Likes: 1,357

From: NY/Canada border

Had this happen a couple of months ago in rainy conditions. Messages kept popping up about the trailer being connected, then disconnected and then a trailer light being out.
Randomly every few seconds.
I was going to do do Tom's suggestion of popping the trailer plug apart and filling with dielectric grease. But the problem went away and hasn't returned no matter what the weather. Heading south in March, pulling an enclosed trailer and 4 motorcycles. I think I may address the issue before I leave.