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Old 09-20-2021, 05:48 PM   #21
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If plugged into SP and the battery disconnect switch is closed (meaning current will flow through it) and the BIM is wired correctly and working, the converter will keep both the house and chassis batteries charged.

If the disconnect switch is OPEN, neither house nor chassis batteries will be charged. If you have an indicating light near your battery disconnect switch, it DOES NOT indicate the status of the disconnect if plugged into SP. It will be lite regardless of the actual status of the battery disconnect.

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Old 09-20-2021, 08:02 PM   #22
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My shore power will charge both batteries..I believe
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Old 09-21-2021, 03:46 AM   #23
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Hello everyone,
I'm new to this. I have a brand new Thor Four Winds 28Z, and here is Texas is too hot in summer, so I stored it (always stored plugged in to shore). I went to inflate tires and the chassis battery was weak when I started.
Does the shore power charges the chassis battery?
If not, then is it safe to use a battery charger and maintainer?
and if so, what type of chassis battery does it have, wet cell, gel, AGM, Lithium?

I got a NOCO Genius 5 charger and I have to choose a battery type. I couldn't find anything on the maintenance manual.
Thanks for the help!!
Look under the steps and you should see them. It'll be obvious if you know anything about batteries. In all likelihood unless you paid for an upgrade, they are FLA.
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Old 09-21-2021, 09:04 PM   #24
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Kurts repair checked the issue..as stated here BIM appears bad. Kurt tested no current to coach battery when engine running & chassis being used when inverter on. I called Thor parts and said I am out of warranty and parts said mention to service as goodwill. Thor service shipping free & kurt said he would install free of charge..

Thx all
Bim arrived today. Kurt installed free of charge.
So far all is working thx all
Old BIM attached
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Old 09-21-2021, 09:26 PM   #25
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Originally Posted by Scubawise View Post
Bim arrived today. Kurt installed free of charge.
So far all is working thx all
Old BIM attached
Why would the BIM look like it is 20 years old? What environment is it kept in? Also, why is one lug still on the BIM?
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Old 09-21-2021, 10:21 PM   #26
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Why would the BIM look like it is 20 years old? What environment is it kept in? Also, why is one lug still on the BIM?
Two years of driving on salt covered roads are driving on the beach.
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Old 09-21-2021, 11:47 PM   #27
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It is a 2020. Sat on lot at MHS for 1 year..only had it a year..maybe they swapped one out that was not working..
Kurt could not get the contacts off or screws so it cut wires and put new contacts on..
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Old 09-21-2021, 11:48 PM   #28
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Why would the BIM look like it is 20 years old? What environment is it kept in? Also, why is one lug still on the BIM?
He used new lugs would not come off and new contacts.
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Old 09-21-2021, 11:50 PM   #29
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He used new lugs would not come off and new contacts.
Besides it sits down exposed to the weather and all road debris, rain dirt, etc, thrown at it. Not protected at all. I presume it's under the steps in the battery compartment.
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Old 09-22-2021, 12:39 AM   #30
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No right above driver tire on the front of engine compartment
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Old 09-22-2021, 03:08 AM   #31
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Originally Posted by 16ACE27 View Post
If plugged into SP and the battery disconnect switch is closed (meaning current will flow through it) and the BIM is wired correctly and working, the converter will keep both the house and chassis batteries charged.

If the disconnect switch is OPEN, neither house nor chassis batteries will be charged. If you have an indicating light near your battery disconnect switch, it DOES NOT indicate the status of the disconnect if plugged into SP. It will be lite regardless of the actual status of the battery disconnect.
Thanks a lot, I'm going to check it out.
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Old 09-22-2021, 03:09 AM   #32
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Look under the steps and you should see them. It'll be obvious if you know anything about batteries. In all likelihood unless you paid for an upgrade, they are FLA.
Thank you for your comment!
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Old 09-22-2021, 03:10 AM   #33
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Originally Posted by 16ACE27 View Post
If plugged into SP and the battery disconnect switch is closed (meaning current will flow through it) and the BIM is wired correctly and working, the converter will keep both the house and chassis batteries charged.

If the disconnect switch is OPEN, neither house nor chassis batteries will be charged. If you have an indicating light near your battery disconnect switch, it DOES NOT indicate the status of the disconnect if plugged into SP. It will be lite regardless of the actual status of the battery disconnect.
Thanks a lot! I always store it with the disconnect switch open, so I'm going to close it, to see if it charges the chassis battery. It is a 2021, so if equipped, it should work. Thanks!!
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Old 09-22-2021, 03:11 AM   #34
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My shore power will charge both batteries..I believe
thanks a lot for the comment!
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Old 09-23-2021, 07:32 PM   #35
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Check the solenoid on the bird or your use/ store switch is left on
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