7-Way 12 Volt Circuit Not Working on Trailer With 3 Different Trucks

Question:

I HAVE 3 FORD TRUCKS 2004,2005,2008.THE AUXILIARY WIRE ON TRAILER PLUG WORKED ON EACH FOR A TIME.NOW NONE WORKS.MY TRAILER SEEMSTO BE FINE.IS THERE A FUSE IN THESE TRUCKS THAT IS BLOWN?

asked by: Brad H

Expert Reply:

There should be a fuse for the 12 volt auxiliary circuit on your trucks, but you'd have to check each individual owner's manual for the location. That said, it seems very unlikely that each truck would have this simply stop working and the circuit would be blown.

I'm nearly positive that is instead the wiring or 7-way on your trailer that is causing this issue, as even a bit of corrosion in the plug can stop the signal from getting through so the best course of action, if the fuses are not blown (which again, seems really unlikely to me), is to replace your trailer's 7-way with the Hopkins 7-Way RV Style Connector # H20046.

expert reply by: Kyle S