So today I did a stupid thing. I hooked my battery up backwards and now I have no lights working off one circuit. I blew the two fuses on the converter. Before I replaced them I had no power for frig, light, slides, etc. When I replaced the two fuses everything works except for this one circuit. The 15 amp fuses will blow in the bad circuit every time I hook the battery up or if I try to put in a new fuse. I have tried to trace them back to from the fuse box to the switches but everything looks fine. I don't have a tester, but I will need to go and get one. ICould this be short now in the circuit or just a short in the converter?This last time I tried it the frig did not work again. Any suggestions would be helpful, if not it will be off to the dealer for several weeks which kills camping for us this weekend and next.

Do you know exactly what's on that circuit? Something blew - unlikely to be a light, and most likely to be something electronic. So, other than lights, what's on that circuit?

Appears to be the Kitchen area ceiling lights and the over the island lights. I tried every thing else and it all worked. Along with the both AC units. The frig was one.When I disconnect the battery and plug into shore power it appears I no power to the 12 volt side. I think I only get power from the battery.This does not explain the bad circuit yet.

The wiring goes from the board to the switches. One set of lights are LED and the island lights are bulbs. Short i the switch or a bad light maybe? What is the best way to trace down this circuit?

It wouldn't short a switch. Does it blow a fuse if all the switches are off? Any 12V outlets in that area which might have something plugged in? One of those 12V outlets with USB charger? LPCO detector? Smoke detector (they're usually 9v battery operated, though)?Are there multiple wires going into the terminal block on the converter for that fuse? If so, disconnect them all, a new fuse shouldn't blow (or the converter board got screwed up). Then connect them one at a time to see which one(s) cause(s) the fuse to blow (if you had a meter, a supply of fresh fuses wouldn't be necessary).

All switches are off and the fuse blows. One wire from the terminal block. The wire from the terminal block feeds into a wire nut with three wires out of it.I think tomorrow I will take that wire nut apart and connect one wire at a time to see if I can isolate that wire if possible, then try to trace that wire and see what it feeds.I will also check out the converter and get a meter.

Elctrical Circuit Issue | Good Sam Community

28 Replies

PaulJ2
Explorer
Sep 16, 2016
mike-s wrote:
Do you know exactly what's on that circuit? Something blew - unlikely to be a light, and most likely to be something electronic. So, other than lights, what's on that circuit?

Agree. Look for something in the trailer that plugs into the round 12 volt outlets, like maybe a flat screen tv, and not only in the kitchen.
dthfsa
Explorer
Sep 16, 2016
Converter is a WFCO 55amp Model WF-9855
budwich
Explorer
Sep 16, 2016
dthfsa wrote:
Appears to be the Kitchen area ceiling lights and the over the island lights. I tried every thing else and it all worked. Along with the both AC units. The frig was one.
When I disconnect the battery and plug into shore power it appears I no power to the 12 volt side. I think I only get power from the battery.
This does not explain the bad circuit yet.

this doesn't sound right / good. It appears to be a problem with the converter somewhere or you still have a fuse issue. Most converters have a point where you can readily measure the voltage being produced so you DO need a meter to check this. Of course, also indicating specifically what converter you actually have will help narrow down the issue further.
dthfsa
Explorer
Sep 16, 2016
All switches are off and the fuse blows.
One wire from the terminal block.
The wire from the terminal block feeds into a wire nut with three wires out of it.
I think tomorrow I will take that wire nut apart and connect one wire at a time to see if I can isolate that wire if possible, then try to trace that wire and see what it feeds.
I will also check out the converter and get a meter.
mike-s
Explorer
Sep 16, 2016
It wouldn't short a switch. Does it blow a fuse if all the switches are off? Any 12V outlets in that area which might have something plugged in? One of those 12V outlets with USB charger? LPCO detector? Smoke detector (they're usually 9v battery operated, though)?

Are there multiple wires going into the terminal block on the converter for that fuse? If so, disconnect them all, a new fuse shouldn't blow (or the converter board got screwed up). Then connect them one at a time to see which one(s) cause(s) the fuse to blow (if you had a meter, a supply of fresh fuses wouldn't be necessary).
dthfsa
Explorer
Sep 16, 2016
The wiring goes from the board to the switches. One set of lights are LED and the island lights are bulbs.
Short i the switch or a bad light maybe?
What is the best way to trace down this circuit?
dthfsa
Explorer
Sep 16, 2016
Appears to be the Kitchen area ceiling lights and the over the island lights. I tried every thing else and it all worked. Along with the both AC units. The frig was one.
When I disconnect the battery and plug into shore power it appears I no power to the 12 volt side. I think I only get power from the battery.
This does not explain the bad circuit yet.
mike-s
Explorer
Sep 16, 2016
Do you know exactly what's on that circuit? Something blew - unlikely to be a light, and most likely to be something electronic. So, other than lights, what's on that circuit?

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Elctrical Circuit Issue

28 Replies

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