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Originally Posted by mjayjensen
Sending this through again. Hoping to get some ideas!
Jay
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Hi Jay, sorry to hear about your electrical problems. Always tough, and frustrating to try to track these kinds of things down.
I don't have much to offer here except from basic troubleshooting techniques... Since you've determined the short is happening AFTER the switch, the way I'd probably go about things is to unscrew all the lights, flip the switch, then screw each light in one by one until the fuse blows. The last light you screw in would indicate the approximate location of the short.
It could also be possible that one of the lights, if it's grounded to the frame, has a lose connection that got jostled when your trailer came down on the curb. Do you know if your lights are grounded to the frame at their location, or is the "negative" wire routed all the way back to the DC distribution panel?
Hope this helps!