Originally Posted by dsanctuary
2007 Safari 25 FB works fine on external power or on truck power. No power from trailer batteries which are fully charged. Battery disconnect fuse (5 amp) on panel under bed is good. Any ideas?
You could have a bad disconnect solenoid. You can wire around the solenoid if necessary. Find the heavy red cable (battery direct) at the bottom of the positive bus bar and add a jumper cable (6AWG minimum) and connect it to the right side (the other heavy red cable that leads to your power center) of the solenoid, leaving cable #2 in it's place. This will power your entire trailer.
Of course, disconnect
your batteries BEFORE attempting this work-around!
***It would also be prudent to check the fuses on the solenoid and using a DC volt meter, check the solenoid to see if it indeed works or doesn't. If you don't follow any of this or unfamiliar with the proper use of a meter, find an RV tech who does and have them do it.