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Old 10-14-2019, 08:26 PM   #1
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Default Isolator and Converter

I am in need of advice. I have an older 1991 Ford Econoline van conversion which has a battery isolator and an on board converter that was professionally installed. The issue I am having is that my house
batteries are not charging from the isolator, they only charge when I am plugged into shore power. I have replaced the isolator with the exact one that was originally installed thinking that was the issue, but still not charging. Only the information I can find is for isolators that are hooked directly to the house batteries. Any ideas what the issue maybe?
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Old 10-14-2019, 09:02 PM   #2
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3 pole or 4 pole isolator? 4 pole would be ignition switched.


Also, maybe a fuse or breaker downstream of the isolator (if it has one) is blown
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Old 10-14-2019, 11:18 PM   #3
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Default Isolator and Converter

It is a 4 post, however, only 3 posts are used. I am not sure what you mean by the ignition switched? Can you please provide a little more info, as it sounds like you know alot more than me!!

Thanks!
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Old 10-15-2019, 12:32 PM   #4
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I can't say I fully understand it but needing a 3 pole or 4 pole (with "E" post) depends on different makes and different model year requirements.

This link provides some good info about the excitation wire:

http://www.cooperindustries.com/cont...ST_180012q.pdf

I don't know if that could be the cause of the problem or not.
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Old 10-20-2019, 07:03 PM   #5
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Thank you for the information. I have changed the connections around per the diagram. We are heading out for a 3 week trip to visit our son, hopefully this will work!
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