Originally Posted by Daryl11
Patio light & bath fan/fan lid stopped working. All was good before we left home. Checked DC breaker panel, all is good. Suggestions?
Itís likely that the fan and light problem is connected. Although you said you checked the fuses and all appeared ok, double check. Sometimes fuses appear to be good but have shorted out. To help figure which one could be bad if theyíre not labeled, start pulling fuses and check with an ohm meter for continuity.
After and if all that checks out, try checking voltage on load wires out of fuse panel. As suggested, ground problems cause many of these problems. Check ground connections closely.
Then I would pull a switch to check for voltage there to verify itís not a switch. Remember, there is no ground wire at the 12v switches. The switch simply breaks the voltage to the light or fan. One of the wires should show voltage. If none, then you need to backtrack to find the problem.
A final thought. You could run a temporary bypass length of wire clipped to the frame or negative side of battery and then to the light to see if the light works. That way you can eliminate the possible grounding problems if it doesnít help.