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Old 07-27-2018, 12:42 PM   #1
wjvaldez
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dC Power

Nothing works off batteries. Batteries read ok with hydrometer and voltage is good. Is there a power changeover relay from AC to D.C. that maybe be bad and not allowing the switchover. 2018 Montana.
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Old 07-27-2018, 01:42 PM   #2
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I'll guess by your wording that all the 12v accessories work when plugged into shore power. When not on shore power there is no power from the tested good batteries reaching the 12v accessories. Also sounds like you know how to use your VOM.Your Montana should be equipped with a battery disconnect switch usually located in the basement storage area. If that is good/on, then look for a 30amp resettable fuse located close to the batteries.
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Old 07-27-2018, 01:57 PM   #3
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+1 for Canonman.

If the shut off is not in the basement, it will probably be in the battery compartment. RED pastic key is the give away.

Good Luck,
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Old 07-27-2018, 04:04 PM   #4
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Correct works ok on shore power and the disconnect was checked but the resettable was not will do so and let you know. Thanks.
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Old 07-27-2018, 04:25 PM   #5
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Found only a non-resettable 30 amp fuse by the batteries and it checked good. Also checked terminal blocks from the battery to the house and it checked good. For the heck of it went back to the disconnect switch and rechecked it and it is ok.
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Old 07-27-2018, 04:59 PM   #6
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Quote:
Originally Posted by wjvaldez View Post
Found only a non-resettable 30 amp fuse by the batteries and it checked good. Also checked terminal blocks from the battery to the house and it checked good. For the heck of it went back to the disconnect switch and rechecked it and it is ok.

I think I would jumper over the disconnect switch, just for laughs and giggles...
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Old 07-29-2018, 01:06 PM   #7
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Thanks for all the valuable suggestions. This morning I went out and replaced the 12v 50 a resettable breaker and lol and behold it worked. The original had hi resistance and obviously intermittent. Thanks again.
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