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Old 12-29-2020, 10:16 PM   #1
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Brand: Thor Motor Coach
Model: Challenger 37GT
State: South Carolina
Posts: 25
THOR #14675
Battery charger/converter location

I believe my original 7 yr old converter in my 2014 Thor Challenger has gone bad. We are staying at a 50amp hookup campground and have been here several weeks. My battery voltage had been steadily dropping and is now 11.6. No charging via the installed converter is obviously happening. I temporarily hooked up my 400w portable solar System and quickly got the voltage up to 12.5 in a few hours. I absolutely CANNOT FIND the converter. Not under my bed or anywhere in my exterior storage. I have removed little panels all inside the coach and still cannot find it. I know it has two small fuses and I hope one is blown which could restore charging. Please help if you have any ideas where it might be.

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Old 12-29-2020, 10:26 PM   #2
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Brand: Thor Motor Coach
Model: Hurricane 31S
State: Texas
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THOR #6411
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Originally Posted by Julius View Post
I believe my original 7 yr old converter in my 2014 Thor Challenger has gone bad. We are staying at a 50amp hookup campground and have been here several weeks. My battery voltage had been steadily dropping and is now 11.6. No charging via the installed converter is obviously happening. I temporarily hooked up my 400w portable solar System and quickly got the voltage up to 12.5 in a few hours. I absolutely CANNOT FIND the converter. Not under my bed or anywhere in my exterior storage. I have removed little panels all inside the coach and still cannot find it. I know it has two small fuses and I hope one is blown which could restore charging. Please help if you have any ideas where it might be.
The converter is just below the 12 volt fuse panel in the power center compartment. If you have a side by side power center, it is under the 120 volt circuit breakers on the smaller coaches. In the larger coaches, it is part of the inverter
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Old 12-30-2020, 12:00 AM   #3
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Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 9,730
THOR #7035
And the reverse polarity fuses are the LARGE fuses on the DC distribution panel.

BTW, what's the status of your USE/STORE (Battery Disconnect) switch? The converter will not charge the batteries if it is open.
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Old 12-30-2020, 02:09 PM   #4
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Brand: Thor Motor Coach
Model: Challenger 37GT
State: South Carolina
Posts: 25
THOR #14675
Still cannot find

The Battery Disconnect switch is oddly a rocker switch that remains in the center position after pressing Use or Store. I just pressed down the Use position just to eliminate that remote possibility. I removed an access panel to the back of the 120v breaker panel and although a ton of wires, there is no converter there. Now I gotta pull the under sink floor panel to continue the search. This is nuts.
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Old 12-30-2020, 02:46 PM   #5
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Brand: Thor Motor Coach
Model: Hurricane 31S
State: Texas
Posts: 3,488
THOR #6411
Quote:
Originally Posted by Julius View Post
I believe my original 7 yr old converter in my 2014 Thor Challenger has gone bad. We are staying at a 50amp hookup campground and have been here several weeks. My battery voltage had been steadily dropping and is now 11.6. No charging via the installed converter is obviously happening. I temporarily hooked up my 400w portable solar System and quickly got the voltage up to 12.5 in a few hours. I absolutely CANNOT FIND the converter. Not under my bed or anywhere in my exterior storage. I have removed little panels all inside the coach and still cannot find it. I know it has two small fuses and I hope one is blown which could restore charging. Please help if you have any ideas where it might be.

Here are a couple photos of my PD-4590 power center. The fan in the lower portion of the PC is for the 90 amp converter. The bottom is a picture of the Xantrex Freedom XC 2000 inverter/converter.


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Old 12-30-2020, 09:04 PM   #6
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Brand: Thor Motor Coach
Model: Challenger 37GT
State: South Carolina
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THOR #14675
FOUND IT. It was inexplicably Installed Under the floor panel directly below the kitchen sink and directly below the drain p-trap. WOW. Well after thoroughly testing it, all is well with the converter/charger. It is outputting 13.6 volts and all the fuses on my 12v distribution panel have 13.6v but my coach batteries are well below at 12.4v where my temporary solar charger is maintaining them. So now I gotta trace the 13.6v cable that must route back to the battery bank. Oh Boy
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