trailer connection issues

I just had the same issue with my truck and trailer recently. Haven't learned how to pin other threads here but if you look under my posts you can find it.

It's labeled. "Intermittent brakes".

Turned out to big a pretty good issue and waiting to see what it's going to cost me when I go to pick up the trailer.

Basically, all the positive wiring bits you send to the camper all pass through their loads, then are gathered up and come back to the truck as a common negative. The negative wire thereby carries the most current, and as a result usually faults the most because of heating and cooling.

You said your brakes seem less effective, and the connection seems to flutter. Somewhere, you have a bad negative return wire. If you get to the point where the connection goes bad, connect a jumper to your truck negative, and connect to the trailer battery negative. If that fixes it, first identify the wire to the trailer plug from the battery. Take the plug apart and tighten the individual wire holding screws. Also check the negative battery terminal on the trailer.

Still a problem? Keep using the jumper to short out smaller sections of the wiring to see if you can isolate one part, either the truck side or the trailer side.

The 7 pin connection. I've had this happen a few times on prior trucks of mine.

rhagfo wrote:
Get some electrical contact cleaner and use as directed on both sides of the connection.

which connection? the one from the 5'er to the truck?

Thanks

Get some electrical contact cleaner and use as directed on both sides of the connection.