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Old 04-20-2013, 05:19 PM   #1
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Strange 12v Issue

My 12v systems are good on shore power but I'm not getting 12v to my house fuse panel when I run on battery. The battery is good and powers everything external prior to the house panel so everything 12v after the panel is dead. All the re-settable CBs next to the battery show good voltage on the downstream side. Also, if I disconnect the battery when on shore power, I get the exact opposite symptoms: this inside 12v stuff works but the outside does not. Would they have buried a fusible link somewhere deep in the bowels of the camper on the long run btwn the battery and the panel? I'm pulling the insulation sheets underneath and chasing the run along the inside frame rail. Will update when I find something.
If anyone has any ideas for what I should be looking for, please chime in!
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Old 04-20-2013, 05:32 PM   #2
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I don't know what type of Converter or panel you have, but on my panel there are two fuses on the battery input which if blown will exhibit what you are seeing.

On my panel, they are the topmost fuses, and there is not "blown fuse" indicator on these two fuses.

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Old 04-20-2013, 05:48 PM   #3
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Quote:
Originally Posted by fishman View Post
Would they have buried a fusible link somewhere deep in the bowels of the camper on the long run btwn the battery and the panel?
There is an inline fuse or resettable breaker between the battery and the converter. On my trailer, its located underneath the trailer, at the driver's side corner - about four feet from my batteries.




It could also look something like this - see the little button?
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Old 04-20-2013, 07:01 PM   #4
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RodeoGeorge- thanks for the feedback. I checked but do see any mains on the 12v side of my panel.

Triguy- what on Earth were they thinking! I'll follow my main wire back and look for a breaker.

Thanks again folks!
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Old 04-21-2013, 11:51 AM   #5
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Angry Fixed but Annoyed

First I want to thank the forum members that assisted with my troubleshooting.
I chased the 12v main wire the entire length of the underside frame rail looking for the hidden breaker. I never found an additional breaker but with all the tugging and yanking on the wires, I found the problem. When I came back up front to the battery compartment I noticed the main wire had fallen completely from its connector! Then I noticed about half of the strands had been clipped off. I'm guessing the factory genius that did the assembly made a bad first crimp with a tool that wasn't big enough for 6ga wire. Then rather than get a new connector and the right tool, he trimmed some strands and forced it back into the already crimped connector and tried to squeeze it a bit more. One way or the other, this was some shoddy work and resulted in a senseless waste of my time.
OK, I'm done ranting. Time for a cold beer.

From top to bottom the attached images are:
1. original connection
2. loose wire
3. clipped strands
4. final fix
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Old 04-21-2013, 12:55 PM   #6
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You did good Fishman!! Better you to find and fix than a possible "nother" failed fix!

Now you know your trailer even better.
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Old 04-21-2013, 01:00 PM   #7
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Glad you found the problem. Makes you think that some people are at work just to draw a pay check. Not taking any pride in their work.

Sounds like you still made happy hour!!!
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Old 04-21-2013, 03:34 PM   #8
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Quote:
Originally Posted by Vinster30 View Post
Sounds like you still made happy hour!!!
Happy hour and then some! Watching to O's struggle w/ the Dodgers before heading back out to knock a couple more items off the honey-do list.
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