We have just brought home (new to us) a 2015 Cruiser Aire fifth wheel. Plugged it into our outside 20A outlet and it trips the GFCI. I have isolated the problem to the 15A microwave circuit. I have u...
There is a good chance that the White (neutral) and Ground are touching. If the plug for microwave is easy to get to pull the plug out and look at wiring. You can try taking the plug off and separating the wires. You can also look at the trailer breaker box and make sure the White and ground are not together.