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Old 06-01-2023, 08:47 PM   #1
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Question House batteries hook-up sequence.

Howdy,

Iím replacing the two house batteries in our 2004 Adventurer 33V.

Question: in what sequence do I hook-up the batteries? Positive 1st or, negative 1st?

Thanks muchÖ
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Old 06-01-2023, 10:26 PM   #2
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Disconnect Neg first then Pos

Connect Pos first then Neg

Take pictures of battery/cables PRIOR to disconnecting/removing old batteries
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Old 06-02-2023, 08:25 AM   #3
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Quote:
Originally Posted by Old-Biscuit View Post
Disconnect Neg first then Pos

Connect Pos first then Neg

Take pictures of battery/cables PRIOR to disconnecting/removing old batteries

Thanks....👍
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Old 06-02-2023, 08:51 AM   #4
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OB is probably correct for that 2004 Adventurer. BUT, on newer Adventurers with a Magnum Inverter installation disconnecting Neg first can easily fry the inverter.

Winnebago does install a separate "salesman switch" type rotary cut off between the inverter and the battery bank. IF that's off then disconnecting the neg first is fine. But if that step was overlooked disconnecting the neg first makes the Magnum Inverter search for the missing chassis ground through very tiny circuit board traces. It will find a ground via other remote connections and fry the circuit board.

I assume that all Magnum installations are like this, not just on Winnebagos. But I have no idea about other brands of inverters. By the way, Magnum has BIG warnings about this in their documentation... assuming you read those things.
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Old 06-02-2023, 09:07 AM   #5
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Quote:
Originally Posted by creativepart View Post
OB is probably correct for that 2004 Adventurer. BUT, on newer Adventurers with a Magnum Inverter installation disconnecting Neg first can easily fry the inverter.

Winnebago does install a separate "salesman switch" type rotary cut off between the inverter and the battery bank. IF that's off then disconnecting the neg first is fine. But if that step was overlooked disconnecting the neg first makes the Magnum Inverter search for the missing chassis ground through very tiny circuit board traces. It will find a ground via other remote connections and fry the circuit board.

I assume that all Magnum installations are like this, not just on Winnebagos. But I have no idea about other brands of inverters. By the way, Magnum has BIG warnings about this in their documentation... assuming you read those things.
Pretty sure OPs 2004 Winnebago Adventurer 33V doesn't have a Inverter.....just a standard Converter
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Old 06-02-2023, 09:12 AM   #6
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Quote:
Originally Posted by Old-Biscuit View Post
Pretty sure OPs 2004 Winnebago Adventurer 33V doesn't have a Inverter.....just a standard Converter
I agree... but some early 2000s Winnebagos did have Dimension Inverters which are now part of Magnum's company history. However, I don't know if the Dimensions inverters had this same precaution or not.

I added my caution not so much for the OP but for future readers that happen upon the thread and may not be aware.
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Old 06-02-2023, 01:55 PM   #7
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House batteries hook-up sequence

Our prior 2007 Itasca Sunova 26P had a Dimensions Inverter. Removing and replacing the batteries in the order stated by OB did not harm the inverter or the batteries.
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