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Old 09-03-2013, 07:00 PM   #1
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What is the purpose of battery isolator switch?

This week I found that none of the 12V accessories would work when on battery power, although the propane detector and tank level indicators would
function. Light indicating 12V power would also light up indicating I had battery power. Everything worked when plugged into exterior power supply.
I think I narrowed it down to the battery isolator switch located on the positive lead off of the battery about 2ft away from the battery. I by-passed it and everything worked OK. What is its purpose? and why did the propane
detector and tank level switch work on battery but nothing else worked.
Thanks in advance
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Old 09-03-2013, 07:41 PM   #2
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Wow that's a tough one. Sounds like the contactor in the switch is bad and allowing some bleed through. (A few mA worth anyway.). But then without seeing it this is a shot in the dark.
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Old 09-03-2013, 07:53 PM   #3
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On my Georgetown, the propane detector and the steps are on a separate circuit from those tied to the isolator switch. I have not tried the info panel with the switch on.

The purpise is to prevent battery drain while in storage. I think (hope) that it prevents overcharging when hooked to shore power too.
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Old 09-03-2013, 10:27 PM   #4
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Quote:
Originally Posted by breul View Post
...
I think I narrowed it down to the battery isolator switch located on the positive lead off of the battery about 2ft away from the battery. I by-passed it and everything worked OK.
Are you taking about one of these?

Name:   image-1700983979.jpg
Views: 146
Size:  12.4 KB

If so, it's a (often resettable) fuse. Look for a reset button, or buy a new one of the same rating.
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