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03-31-2023, 01:10 PM
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#1
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Junior Member
Join Date: Mar 2023
Posts: 10
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House Battery grey telephone wire ???
Hello:
I have a 2006 Fleetwood Excursion 39L motorhome.
I took the house batteries out of the RV and brought them home for the winter and noticed that there is a grey telephone type cable that has broken off.
I think it might be some sort of a sensor or possibly a fuse.
I have attached a picture that I found of the internet that has the same type of wire. Look above the second battery from the right and you can see the grey wire leading to the battery positive connection.
So my questions are:
1. What does this grey telephone type cable do?
2. Can it be replaced and if so where I obtain one. (I live in Canada but would imagine I have to order it from the USA)
Appreciate your help on this matter. Just trying to get it all back into perfect running condition.
Thanks kindly
Bill Kemp
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03-31-2023, 01:17 PM
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#2
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Senior Member
Join Date: Jun 2011
Location: FL
Posts: 11,005
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Temperature sensor for the Charger. It monitors the battery temp to make sure it does not charge too hard if they are hot.
__________________
Certified Senior Electronic Technician, Telecommunications Engineer, Telecommunications repair Service Center Owner, Original owner HR 2008
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03-31-2023, 01:33 PM
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#3
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Senior Member
Join Date: Apr 2018
Posts: 3,344
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You need the proper temp sender for your exact charger.
__________________
2004 Dynasty 4
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03-31-2023, 01:33 PM
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#4
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Senior Member
Join Date: Jul 2014
Posts: 33,292
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It's a BTS , battery temp sensor. If damaged it can overcharge or undercharge your batteries .
Unplug it from the inverter/charger and the default temp is 77 degrees F. A safe temp for most conditions.
They cost around $25. Look up for magnum or Xantrex, depending on brand of inverter/charger.
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03-31-2023, 01:55 PM
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#5
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Junior Member
Join Date: Mar 2023
Posts: 10
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Thanks folks
I really appreciate your help on this
I will go to the RV and find out what the brand of inverter is on it.
Then I will hunt down the part.
I'll keep you posted
Thanks
Bill
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03-31-2023, 07:15 PM
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#6
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 28,561
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Quote:
Originally Posted by twinboat
It's a BTS , battery temp sensor. If damaged it can overcharge or undercharge your batteries .
Unplug it from the inverter/charger and the default temp is 77 degrees F. A safe temp for most conditions.
They cost around $25. Look up for magnum or Xantrex, depending on brand of inverter/charger.
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 Been there, done that; and ruined house batteries before I realized what was happening. Mine wasn't even installed correctly, it was on top of battery cables instead of underneath against the battery.
IMO it should be on the side of the battery case to get a more accurate temperature.
__________________
2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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03-31-2023, 09:04 PM
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#7
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"Formerly Diplomat Don"
Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 22,395
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__________________
Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor
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03-31-2023, 09:26 PM
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#8
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Senior Member
Join Date: Apr 2018
Posts: 3,344
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Quote:
Originally Posted by Dutch Star Don
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Xantrex has more than one, order it for your exact inverter. A older 458 will not work on a pure sine wave 3200. That I know from experience.
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2004 Dynasty 4
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04-01-2023, 06:56 AM
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#9
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Junior Member
Join Date: Mar 2023
Posts: 10
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Thanks guys. The RV is parked an hour from my home by the I laws house. Next time I we visit them I will check on the exact model of inverter and order a new one.
I have not followed the TS wire to see where it feeds into the inverter compartment but I would hope that it is easy to get at and replace.
I am pretty sure mine is a Xantex inverter/charger but cannot recall what model.
Once gain I appreciate your help
Bill
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04-01-2023, 12:15 PM
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#10
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Senior Member
Join Date: Jun 2011
Location: FL
Posts: 11,005
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The inverter/charger will be very close by. Short cables for the inverter is very important.
Great links Don!
__________________
Certified Senior Electronic Technician, Telecommunications Engineer, Telecommunications repair Service Center Owner, Original owner HR 2008
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04-01-2023, 01:47 PM
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#11
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Junior Member
Join Date: Mar 2023
Posts: 10
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Hello guys:
I went to the RV today and took some pictures of the inverter.
It is in fact a Xantex Freedom 458.
Here are some pictures of the inverter and the control panels.
Just need to know the exact TCS to purchase now.
Thanks for your help
Bill
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04-01-2023, 02:11 PM
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#12
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Senior Member
Join Date: Jul 2014
Posts: 33,292
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Looking at your picture, I see a black phone type wire plugged into the TSC.
In your description you said it was a gray phone type wire.
Makes me wonder ?
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04-01-2023, 02:24 PM
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#13
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Junior Member
Join Date: Mar 2023
Posts: 10
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Thanks for noticing that.
I will look in the battery compartment to see what color the wire is that leads to the house battery compartment when I am up there the next time.
I could be wrong about the color.
Bill
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04-01-2023, 02:37 PM
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#14
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Junior Member
Join Date: Mar 2023
Posts: 10
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I will also pull the control panel off and see what color the wire is.
This way I can make sure the correct wire gets plugged into the correct slot.
I don't think they were reversed but you never know. I rarely use the inverter and mostly charge the batteries with the generator.
Bill
Plus it sure would be nice to get a better understanding of the control panel so I completely understand how things work.
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