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Old 03-29-2016, 06:06 PM   #1
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No 12 volt power in coach

i have a 2003 fleetwood jamboree
i have no 12 volt power in coach,shore power or not,batteries good converter good 13.57v out back of converter. need help thanks
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Old 03-29-2016, 06:19 PM   #2
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Is your battery switch turned on ?
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Old 03-29-2016, 06:32 PM   #3
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yes, may be a ground but where
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Old 03-29-2016, 06:34 PM   #4
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The only thing this forum can tell you is to start checking. There are too many things that can cause this.

Do you know how to use a voltmeter (best) or a test light(still OK).

Basically your converter converts 120V to 12V DC AND charges the batteries.
When you plug into shore power, the converter begins to charge your batteries and also provide the 12V for the lights.

Since your batteries are good, you need to start following the battery cable as it leaves the POS. terminal, and check the voltage at the next connection.

Work your way to the converter, and then out of the converter and into the coach. Your battery disconnect may be inside your converter.

Somewhere, you will stop seeing the 12v....and that is where your problem is (between the last good measurement, and the bad measurement.

You might have breakers or fuses on the output of your converter.
I think your battery circuit will run through your converter....but not 100% sure...others can confirm.

Good Luck,

Dan
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Old 03-29-2016, 06:46 PM   #5
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Thank You
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Old 03-29-2016, 07:51 PM   #6
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On every rig I have owned. The converter would power the interior lights when plugged into AC power.

That could be where to look first. Why no 12V with AC to the rig..
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Old 03-29-2016, 08:04 PM   #7
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I have a rocker switch on the dash of my coach and if you bump it or push it, it will kill all the 12 volt system in the coach.
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Old 03-30-2016, 04:16 PM   #8
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Failure of 12V Lights and other 12V Systems when Shore Power is Disconnected.

The first thing I would check. The Block diagram will show you where it is.

- Manual Reset Circuit Breaker (tiny button on end)
This button is hard to find, very small and hard to see without a flash light.

This link will take you to a Block Diagram of 12V System Components

http://manuals.heartlandowners.org/m...iagnostics.pdf
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Old 03-31-2016, 10:22 AM   #9
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Thanks to all,S Bradley that link was awesome.
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Old 04-03-2016, 07:54 PM   #10
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it was the manual reset breaker,4 dollars later i'm good to go. Thanks Again
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Old 04-04-2016, 01:10 AM   #11
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$4 GREAT, that's what we all hope for, great savings.

Glad to have helped.
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Old 04-05-2016, 02:41 PM   #12
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now that i have worked my ele. system i have better understanding how it all works.all you need is multimeter and you can chase any problem.
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Old 04-09-2016, 10:12 PM   #13
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Add a Load pro to your Multi Meter and you will be able to test nearly all 12V issues.
For quick & dirty testing a simple probe will work. Don't poke holes in wires if the tip is sharp, I would actually file off that sharp point.

Just some suggestions.
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