finding a faulty wire

[JERRY&LINDA]

Hello everyone, What is the best way to find a wiring fault that blows a 20 AMP fuse. I have visually checked all exposed wires ... no breaks ... does anyone have a wiring diagram for a Flagstaff 23FBS?

[NWJeeper]

Wiring diagrams for most RVs are practically non-existant, not to say that a few don't exist but I wouldn't count on it. Your best bet is a multimeter and start doing some troubleshooting. My bet is somewhere the insulation might have rubbed off a wire just a bit and is getting to ground. What circuit is it?

[milzat]

As NWJ stated, you may not find a wiring diagram for an RV.

If a fuse is blowing, it's a sign of a Short Circuit or a higher amperage draw than the fuse is designed to handle.

To check for a Short Circuit(wire contacting unit frame):

Example: If you're testing a light circuit.

1) Disconnect the wire at both ends(at the switch and at the light fixture).

2) Connect one lead of an OHMMETER to the unit frame(ground).

3) Connect the other lead of the OHMMETER to the wire you're testing.

If it shows continuity, the wirer has a Short Circuit(grounded to frame).

[cfsoistman]

You didn't mention what this 20 amp is protecting ? It should be labeled. Others with similar units might know what else might be on that circuit or it may be alone. A little more info may help narrow your search. Good luck!

[JERRY&LINDA]

Thanks for for all the advice ... I found the red and white wire connectors for the water pump switch were touching ... use some electrical tape and fixed that ... the lights for the Micro Monitor now work and the slide out lights now work and the 20 AMP fuse did not blow...HOWEVER the water pump and the bathroom ceiling fan still do not work.... that maybe a different problem

Guess what I found when I was checking the wires under the trailer .... one of my tires has a big bulge "a knot" ... the tires are Carlise and I have already replaced two since August 2007 ... guess it is time to buy a new set of tires all the way around ... any suggestions on brand?