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Old 04-23-2017, 12:37 AM   #1
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Default All coach electric dead. Help!

All my 12 volt power went dead, I installed a new battery and the lights and appliances worked for 24 hrs, today it is dead again, generator won't start either... seems like something is draining the system, what should I check?
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Old 04-23-2017, 01:18 AM   #2
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All my 12 volt power went dead, I installed a new battery and the lights and appliances worked for 24 hrs, today it is dead again, generator won't start either... seems like something is draining the system, what should I check?

YOu can use a volt meter to go through each fuse one by one...

Do a search on youtube, there are lots of video on how to trace an electrical short.
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Old 04-23-2017, 02:49 AM   #3
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YOu can use a volt meter to go through each fuse one by one...

Do a search on youtube, there are lots of video on how to trace an electrical short.
How do you think that testing voltages at the fuses will pinpoint this problem?

Why assume there is a short rather than valid load?
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Old 04-23-2017, 02:54 AM   #4
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Yep, needs to use an ammeter.
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Old 04-23-2017, 02:55 AM   #5
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All my 12 volt power went dead, I installed a new battery and the lights and appliances worked for 24 hrs, today it is dead again, generator won't start either... seems like something is draining the system, what should I check?
You need to fill in some blanks.

What amp hour battery was replaced and what battery replaced it?

Were you hooked up to shore power or driving during the 24 hour period?
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Old 04-23-2017, 03:06 AM   #6
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How do you think that testing voltages at the fuses will pinpoint this problem?

Why assume there is a short rather than valid load?

Nope... you are making the assumption. Not me. This is only the first step in trouble shooting.


Maybe I should say multi-meter instead of volt meter.

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Old 04-23-2017, 03:41 AM   #7
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Nope... you are making the assumption. Not me. This is only the first step in trouble shooting.


Maybe I should say multi-meter instead of volt meter.

I'm making the assumption regarding a short?

Hey Youngblood, read your own post!:

"Do a search on youtube, there are lots of video on how to trace an electrical short."
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Old 04-23-2017, 04:01 AM   #8
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Old 04-23-2017, 01:33 PM   #9
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"The lights and appliances worked for 24 hrs" - were you connected to shore power? If you run your fridge and a few lights off of a battery for 24 hours, it may very well go dead. This is where the Amp-hours question comes in. 120 Amp-hours means the battery will sustain a 1 Amp draw for 120 hours or a 30 Amp draw for 4 hours or whatever Amp X hours = 120. I would never count on more than 2/3 of the rated Amp-hours being available, though. Your fridge will draw 5-8 Amps, so 2/3*120/8 = 10 hours of running your fridge (+/-).

Did your generator start when you first installed the new battery? If you don't know, how much fuel do you have? What is the minimum for your generator to run? Some generators won't run off of less than 1/2 tank.

Does your chassis alternator charge your house battery? If so, crank up your van and let your batteries charge a bit. Check all of your fuel sources - for example, can your fridge run on propane? Do you have propane? Then, start figuring out where your energy is going!

I hope this is helpful. Good luck to you.
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Old 04-23-2017, 02:41 PM   #10
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Thanks everyone, have not been hooked to shore power...battery is same size...the gen not starting was first sign of problem, then noticed nothing worked, propane works
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