Problems with DC power on Pop Up

Does her POPUP have electric winch for raising the roof... I have one of these AUTO RESET circuit breaker that looks like a relay hanging off my battery positive terminal for that.


Some trailers also may have a in-line fuse holder as well connected to the POSITIVE battery terminal


A DC MULTIMETER would be a handy thing to test what is there 12VDC voltage wise... These are inexpensive $7-$25 from WALMART-LOWES-AMAZON etc... A fully charged battery will read 12.6-7VDC without being connected to SHORE POWER. It should read 13.6VDC when connected to SHORE POWER telling you that you have connectivity between the on-board converter/charger and the battery terminals.



There are three items to test for blown fuse in this circuit. One is the IN-LINE FUSE like shown above and there also should be two fuses on the 12VDC Power Distribution Panels where all the 12VDC fuses are located labeled 'REVERSE POLARITY'. The battery terminals may have been sparked or connected wrong just for a second and these fuses are there to protect everything.

Roy Ken

One of my favorite tools is the TEST LAMP This is way easier to use than a volt meter..

You hook the clip to the battery negative then touch the tip to positive, BRIGHT LIGHT, good

Move the clip to a good frame ground (Usually a nut somewhere, not painted) and again touch the tip to the battery positive BRIGHT good.

now follow the positive wires

Where Bright turns to Dark, there is a problem.