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Old 06-23-2024, 12:42 PM   #1
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Join Date: Mar 2018
Location: Whitehorse, Yukon
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12v system randomly stops and restarts

Greetings,
In our 2018 17B, we've had at least 4 instances over the last two weekends, while boondocking, where the 12v system completely stops and then 10-20 seconds later it comes back on. It seems to happen when the water pump comes on and the gas hot water tank is on. Seems random. I'd welcome any advice on how to figure out what's going on and how to fix it.

Thanks, Dan
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Old 06-23-2024, 01:27 PM   #2
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Quote:
Originally Posted by Dan Paleczny View Post
Greetings,
In our 2018 17B, we've had at least 4 instances over the last two weekends, while boondocking, where the 12v system completely stops and then 10-20 seconds later it comes back on. It seems to happen when the water pump comes on and the gas hot water tank is on. Seems random. I'd welcome any advice on how to figure out what's going on and how to fix it.

Thanks, Dan
Can you say more about how your trailer is equipped?
  • What type of batteries, number and age?
  • Do you have solar?
  • Is your water heater gas only or dual (gas and 120V when on shore power)?
  • Have you checked battery voltage with a voltmeter?
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Old 06-23-2024, 02:11 PM   #3
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Random problems like that can drive you nuts trying to track them down.

My first suspicion would be a loose connection making intermittent contact. I'd pull the panel cover off and carefully manipulate the wires. Loose wires have been a problem in the past.

If all wires that you check seem secure I'd leave the panel cover off and dive in there with a multi meter the next time it went off. I'd especially check the input to the panel.

I don't know what kind of battery switch you have but some of them have had issues in the past. If the power is off long enough I'd check for voltage on both terminals.

Good luck

Ron
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Old 06-23-2024, 03:42 PM   #4
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I’d start by checking all connections and frame grounds for corrosion.
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Old 06-23-2024, 04:55 PM   #5
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My battery terminal connections were lose from the factory causing lights to flicker.
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Old 06-23-2024, 05:34 PM   #6
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Like others have said, whenever I hear "random electrical problems" especially on something that gets bounced around like a camper trailer, I start looking for loose electrical connections starting with the battery ground and working my way from the battery bank.
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Old 06-24-2024, 04:31 PM   #7
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12v system randomly stops and restarts

Thanks all for the suggestions. Answers to SRS questions:
The trailer has:
- 2 original, 2019, GC2 flooded 6v batteries, reading 13.6v. All connections, including the ground to theframe are good.
- 1 solar panel with Go Power controller showing 100% and 13.8v.
- hot water is dual electric and gas.

I have checked panel connections. Appear to have 13.6v incoming to the panel. I'll post a picture of the battery disconnect switch.

My technical knowledge and confidence with this stuff is low. Any good youtube videos welcome.

Thanks again. The search continues!

Dan
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Old 06-24-2024, 05:19 PM   #8
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The type of battery disconnect switch that you have has been problematic for others. Many of us have installed much more robust marine battery switches.

Test both terminals of the switch and wiggle the switch handle and wires a bit. If the power goes off measure the voltage at each terminal. Or jumper the terminals and temporarily bypass the switch.

Ron
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Old 06-24-2024, 06:22 PM   #9
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Thanks for the fast response Ron! Wiggling the switch or wires didn't affect the incoming power. I attached the red and black ends of the multimeter to each of the terminals at the same time, if that's the right way, and got a reading of 0 to .1 when the switch is on, and 13.1 to 13.3 when it's off. In the off position, with one wire grounded, it read 13.6.
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Old 06-24-2024, 09:45 PM   #10
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Quote:
Originally Posted by Dan Paleczny View Post

In the off position, with one wire grounded, it read 13.6.
If the switch has an intermittent contact problem it would show up on the other terminal when the switch was on. With the positive of the multi meter on it and the black to a good known ground.

Did I ever mention that I hate trouble shooting intermittent problems?

Good luck

Ron
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