Good Sam Club Open Roads Forum: 7 Pin Connector From Truck to Trailer
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Open Roads Forum  >  Travel Trailers  >  General Q&A

 > 7 Pin Connector From Truck to Trailer

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schlep1967

Harrisburg, PA

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Posted: 07/26/19 06:34am Link  |  Quote  |  Print  |  Notify Moderator

Adding Dielectric grease to dirty contacts does nothing to clean those contacts. Spray some contact cleaner into your trailer plug contacts. You could even go so far as to run an emery board in and out of each contact. Then add your grease to prevent future corrosion.


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Posted: 07/26/19 09:32pm Link  |  Quote  |  Print  |  Notify Moderator

jerryjay11 wrote:

Since I have been using electrical contact grease on my connectors I haven't had any problems with error messages. It helps prevent corrosion and aids the conductivity of the pins.


To add to my post above...

We (GM shop) tried the grease with our GMC due to water in the 7pin, no luck, no change. Connectors were not dirty as the truck was only 6 months old and had seen one or two dirt roads in the time we had it. And to boot, had a brand new 7 pin put on and it still did it. I would get the error and have zero trailer brakes yet all the trailer lights worked fine.

Trailer was checked out and all worked fine. Truck was checked out and all worked fine.

Wonder if there's something in the e-brake that frustrates the GM computers at hookup (theory at best)? Hook it up before power, zero issues.


2019 Keystone Outback 250URS
2019 GMC Sierra Denali HD 3500 SRW
Traveling K9s Diesel and Roger


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