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Author Topic: SOLVED 12V in coach lost  (Read 444 times)

myface

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SOLVED 12V in coach lost
« on: January 12, 2020, 05:02:46 PM »
I do not know how this happen, but I lost 12V in coach. None shows at control panel and I can not find master switch or BA fuse. I have 12V when gen is running, but as soon as I turn it off the 12V is gone. Any help?. Thanks

Edit by staff - changed message icon to topic solved
« Last Edit: January 15, 2020, 07:16:00 AM by John Canfield »
2001 Winnebago Brave SE 29A

Henry J Fate

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Re: 12V in coach lost
« Reply #1 on: January 12, 2020, 06:08:29 PM »
The house batteries would need to be disconnected by either a fuse, switch or a bad connection either the positive ot the negative or they are no good or not there.

Must be one of those conditions.

Post additional info. Make, year, model, converter, inverter, battery type etc

Henry J Fate

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Re: 12V in coach lost
« Reply #2 on: January 12, 2020, 06:11:26 PM »
Master switch on many of the 2001 winnebagos are inside the entry door.

Gary RV_Wizard

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Re: 12V in coach lost
« Reply #3 on: January 12, 2020, 06:15:23 PM »
"Lost 12v" is pretty broad.  Are you sure it is all lost?  No interior lights? Fridge doesn't cool?   A/c thermostat is out?   

If indeed it is all lost, it sounds like the battery disconnect has engaged.  You have 12v power when the generator powers the converter/charger, but not when you rely on battery only.  What about with shore power?

Your Brave has a Battery Disconnect (Use/Store switch), usually located by the entry door. The switch operates a battery disconnect relay, which will be somewhere near the house batteries.
Gary
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myface

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Re: 12V in coach lost
« Reply #4 on: January 12, 2020, 06:36:50 PM »
2001 Brave SE 29A. The only switch is AUX Battery. I try to flip few times and did not work and I can not locate any other switch.
2001 Winnebago Brave SE 29A

myface

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Re: 12V in coach lost
« Reply #5 on: January 12, 2020, 06:39:22 PM »
All 12V are gone. I run jumper cable from battery to control box and got my 12V back.
2001 Winnebago Brave SE 29A

Gary RV_Wizard

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Re: 12V in coach lost
« Reply #6 on: January 12, 2020, 06:59:56 PM »
Control box?   Can you identify that as to function and brand/model? Sounds like to may be the converter/charger.

The Aux switch is almost surely the disconnect and your jumper clearly bypasses it.
Gary
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myface

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Re: 12V in coach lost
« Reply #7 on: January 12, 2020, 07:51:44 PM »
Control box for 12V. The aux switch click, but nothing happen. The aux switch goes to solenoid in front of vehicle. I am suspecting the solenoid.
2001 Winnebago Brave SE 29A

myface

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Re: 12V in coach lost
« Reply #8 on: January 13, 2020, 09:25:46 AM »
Check the solenoid and works as supposed to. I lost power between solenoid and control box(power distribution). I do have 12V when I start the generator.
2001 Winnebago Brave SE 29A

Ray,IN

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Re: 12V in coach lost
« Reply #9 on: January 13, 2020, 11:20:31 AM »
Is the large master fuse connected in the 12V positive cable wiring good?
2000 Winnebago Ultimate Freedom 40JD, ISC 8.3 Cummins 350, Spartan MM Chassis.  USA 1SG, retired, Good Sam Life member.
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John Hilley

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Re: 12V in coach lost
« Reply #10 on: January 13, 2020, 11:27:01 AM »
The AUX Battery switch is the switch that controls the latching relay that disconnects/connects the House Battery. It is an Intellitec Latching Relay

Intellitec Battery Disconnect Relay
https://www.pplmotorhomes.com/parts/electrical-plumbing-lp-gas/rv-electrical-systems-and-accessories/battery-switches-relays/rv-converters_002733?gclid=CjwKCAiAx_DwBRAfEiwA3vwZYp3ithcNrbNcG_slE7PgoA83iL4B6pLurxYpETIAI3KHVRHLnIdNTxoC-HQQAvD_BwE

There are two fuses on the relay

Battery Disconnect Service Manual

https://www.intellitec.com/wp-content/uploads/2019/04/53-00066-100.pdf
« Last Edit: January 13, 2020, 11:30:40 AM by John Hilley »
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Henry J Fate

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Re: 12V in coach lost
« Reply #11 on: January 13, 2020, 12:29:29 PM »
Another helpful test would be to check the batteries for charge voltage with the generator running.

With the generator running use a volt meter and measure the voltage at the battery with the generator running. Should be over 13 volts. Re-check the voltage with the generator off. You should measure at least 1 volt of change.

There may be a master fuse between the batteries and the distribution box. These are best located very close to the batteries which provides the best protection.

myface

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Re: SOLVED 12V in coach lost
« Reply #12 on: January 13, 2020, 01:04:53 PM »
It was trip 40amp breaker under the dashboard. I will never guess where is. Thanks all for help
2001 Winnebago Brave SE 29A

John Canfield

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Re: SOLVED 12V in coach lost
« Reply #13 on: January 15, 2020, 07:15:08 AM »
 :)) :))
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