look for the infamous silver resettable breaker/fuse. it's along the A-frame, between the battery and the front of the trailer.
there's a little black reset button on it.
when someone installs the battery and crosses the battery wires, it sets this breaker/fuse off.
just Google "resettable 12v breaker/fuse" if you want a pic of one.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC