We have a 2008 Sunset Trail travel trailer and when you push the switch to put in the slide in sometimes nothing happens and sometimes it works a little then quits. Could this be the switch, cause it seems the power is there when we checked it.
could be the switch, could also be the thermal self resetting breaker. These are usually mounted outside on the trailer frame and are prone to corrosion. It could also be a week battery. lots of things to check. Do you have a voltmeter?
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Jason & Wendy
2014 Ford F-350 Lariat 6.7L PSD
2015 Keystone Montana 3711FL
B&W Patriot 16K Fifth Wheel Hitch
usually on the trailer frame close to the battery. rectangle piece with two studs sticking out and a wire connections on each stud. sometimes covered with a rubber boot.
__________________
Jason & Wendy
2014 Ford F-350 Lariat 6.7L PSD
2015 Keystone Montana 3711FL
B&W Patriot 16K Fifth Wheel Hitch