Need help to trouble shooting the cause of Charge Line blown fuse

[johnxhc@gmail.com]

On my Class A Thor 34J (Ford F53 chassis), if I pushed the brake pedal*a few times , the Charge Line fuse blew up, this is repeatable. When that happened, I lost power on Hot and trailer break on 7 way trailer plug.

I looked under the RV, the wire for the 7 way trailer plug, everything looked normal and I did not see anything obvious such as damaged wire etc. How do I find out the location of the trouble line?

I do have a multi-meter.

Any help will be greatly appreciated.

Thanks in advance.

[GTM41261]

Have you tried unplugging the trailer connection and try the brake again. If ok then the problem is in the trailer. First place I would look is where the wires connect to the trailer plug in. Sometimes a strand of wire will touch where it should not. If nothing there since it happens when the brake is applied. I would look for a shorted wheel brake activator.