Drove to the local campground today in heavy rain & just as we pulled on to our site the TV display said we had a 'wiring fault on trailer'
. Truck display gives no additional info on the problem & I could find nothing wrong with the light operations on the trailer. Trailer brakes seemed to be working fine on the drive over too.
Any idea where I should start to isolate the cause? Or should we just chalk it up to something (the 7-pin plug perhaps) got wet? I had left the 7-pin harness laying in the truck bed overnight & we had heavy rain then too.