No power to 12 volt lights

[bert123]

i am new to this site not sure how to ask for help, but here goes. i have a 2003 grand surveyor, and the lights going right up through the middle will not work, lights over the table on the slide over the stove, and over the head of the bed works. check fuses they all seem .can anyone help

[08flagvlite]

bert123, are there any other symptoms? You may have a harness un plugged, or the possibility of a breaker/inline fuse that is underneath the tongue area that provides 12 volt power to all of the 12 v using areas of the trailer; however the AC and electric water heater and the microwave will work just fine. If you follow the positive (should be white) wire from the tongue mounted battery under the frame heading towards the power distribution center and/or converter, you'll see what looks like a junction block with the wires bolted to it, and it is actually a resettable relay. They get corroded as mine did at 4 months old, and need replaced. That could be your problem! Randy