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04-28-2018, 11:49 PM
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#1
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Junior Member
Brand: Thor Motor Coach
State: Alabama
Posts: 4
THOR #11444
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Where is Battery Isolator Solenoid?
Help! Anybody know where the battery isolator solenoid is in my 2003 Thor Four Winds Five Thousand? I've also seen it called a battery disconnect solenoid. (I'm not talking about the solenoid under the hood on the firewall.) I can't hear it clicking. I've read that it is supposed to be behind the 12 volt fuse box under the bed, but I can't find it there. Can anybody tell me what it looks like and where it is?
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04-29-2018, 03:14 AM
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#2
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Senior Member
Brand: Thor Motor Coach
Model: A.C.E. 30.2
State: Ohio
Posts: 103
THOR #8054
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04-29-2018, 03:30 PM
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#3
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Junior Member
Brand: Thor Motor Coach
State: Alabama
Posts: 4
THOR #11444
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Thanks Bruno1950. At least now I know what it looks like. But I still can't find it in or near the electrical compartment under the bed, where the AC breaker/DC fuse box is located. Could you please tell me where yours is mounted?
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04-29-2018, 03:43 PM
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#4
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Senior Member
Brand: Thor Motor Coach
Model: Four Winds 28z
State: Florida
Posts: 401
THOR #5725
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In my 2013 four winds 28z it looked like this. It was next to my toliet in a box- the breaker panel was on the other side of the wall.
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04-30-2018, 07:24 PM
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#5
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Senior Member
Brand: Thor Motor Coach
Model: 2015 Vegas 24.1
State: Pennsylvania
Posts: 1,468
THOR #2601
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Matt:
Don't know if you found it yet but Bruno's picture is the same as mine in my 2015 Vegas. I'm thinking it's the same in your Four Winds. And it is one PITA to find.
I found mine by having my wife cycle the USE/STORE switch on & off while I tracked down where the relay click was coming from. Eventually found it behind the grill in my "hallway" next to the converter box. Opened the grill (that's also where my water heater bypass valves are located. Moved the heater ducting aside and found the relay mounted to the backside of a wooden bulkhead under the refrigerator.
I wasn't having a problem with it -- I just wanted to knw where it was in the event that I had a problem sometime in the future. Had the contacts of the relay not been clicking when activating the USE/STORE switch, I never would have found it.
Here's a picture of mine in situ:
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Ed & Bev Felker
Retired USAF Col and retired Nurse
Traveling with Lily & Bella ('Teddy Bear' breed)
2015 Vegas 24.1 (E-350)
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05-11-2018, 11:49 AM
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#6
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Junior Member
Brand: Thor Motor Coach
State: Alabama
Posts: 4
THOR #11444
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Thanks to everyone for your replies. I finally got tired of looking for the solenoid and took the old RV to the local RV repair shop. Turns out the previous owner had rewired the 12 volt system to bypass the converter (who knows why!) so the auxiliary battery wasn't charging. I really don't understand the mechanic's explanation because the 12v system worked OK for me for 2 years before it inexplicably broke down. And the mechanic says there is no battery disconnect solenoid in this old model. Go figure. Anyway, everything is fixed and works correctly now. Thanks again!
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05-11-2018, 12:21 PM
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#7
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Senior Member
Brand: Thor Motor Coach
Model: Four Winds 28z
State: Florida
Posts: 401
THOR #5725
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So what did he fix?
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03-26-2024, 10:58 PM
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#8
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Junior Member
Brand: Thor Motor Coach
State: Oregon
Posts: 4
THOR #32184
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I'm looking for the solenoid on my 2013 thor and still can't find it. Things I have done; pushed the battery use switch near the exit door. Nothing,
Pushed the reset switch in the BCC. Nothing.
Checked all batteries. Full charged. Now looking for coach battery solenoid. Where is it?
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03-26-2024, 11:35 PM
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#9
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Senior Member
Brand: Thor Motor Coach
Model: '17-Vegas 24.1
State: California
Posts: 2,227
THOR #13362
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Usually behind or near your Breaker Box/Converter
So might be a bit tight to get at it, but can be done
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'17 Vegas 24.1
Fallbrook, CA
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03-27-2024, 12:03 AM
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#10
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Senior Member
Brand: Thor Motor Coach
Model: 2011 FW Hurricane 33T
State: England
Posts: 1,296
THOR #16471
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Quote:
Originally Posted by Ricker24
I'm looking for the solenoid on my 2013 thor and still can't find it. Things I have done; pushed the battery use switch near the exit door. Nothing,
Pushed the reset switch in the BCC. Nothing.
Checked all batteries. Full charged. Now looking for coach battery solenoid. Where is it?
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You have a BCC? Usually inside it, what model of BCC (top LH corner of cover)?
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