Forum Discussion

mr_andyj's avatar
mr_andyj
Explorer
Apr 24, 2021

Corroded 7-pin no more

This was my solution which I did last year, so am pretty confident it is a good fix.

Your 7-pin trailer plug gets all corroded with green algae-looking mess then it will not work right. You have lights that do not light, brakes that do not work, battery that does not charge...

I simply put a circuit breaker between the plug and the camper battery. When in storage I can break the connection so the 7-pin plug has no voltage connected to it from the battery.
I used a 30 amp one like this circuit breaker
Link just for example.

Now there is no electrical potential at the plug during damp days and night. I have not experienced any corrosion.

With solar I often do not need to be connected to the alternator when driving, so can use this circuit breaker as a switch to choose also.

Cheers.

12 Replies

  • Corrosion and moisture can do strange things. Many moons ago, our TT was stored for winter in the back yard. , no power but battery. One wet snowy night the running lights came on powered off the battery!
    Went out and shook the wet snow out of the 7 pin to shut them off. Since then I try to remember to keep the plug high and spray it and truck socket with dielectric grease a couple times a year.
  • Replacing the 7 pin connector is just a routine maintenance IMO. My 2015 Tahoe “complained” about a bad connector, so I’m sure the 2020 1500 will too someday.

About Technical Issues

Having RV issues? Connect with others who have been in your shoes.24,240 PostsLatest Activity: May 04, 2025