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Old 01-31-2019, 02:49 AM   #1
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Brand: Thor Motor Coach
Model: Four Winds 31W
State: Illinois
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THOR #7230
Battery switch on Dash

My 2017 Thor class c has a switch on the dash to use if the coach battery is dead you can start the engine from the house batteries. Does anyone know how this should work. My coach battery was dead the other day so I tried the switch, and nothing happened. I know the house batteries were good, they stay charged via a solar panel. Plus the house batteries were able to start my genny.
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Old 01-31-2019, 03:16 AM   #2
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Model: Axis 24.1
State: Michigan
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THOR #1150
You hold the switch down for 10 seconds or more and then attempt to start an engine (depending on if you're attempting to start the generator or the V-10).

Its a jumper cable: As long as the switch is held down the two systems should be connected (should because if one battery is completely dead then it doesn't work too well).
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Old 01-31-2019, 10:24 AM   #3
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Model: Vegas 25.2
State: Florida
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THOR #6999
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Tacouser,

I went thru the same issue on Tuesday. See the thread Automotive Electrical problems under Maintenance and Repair for all of the suggestions I got.

My problem turned out to be a dead battery, only .5V output. Jumped it from a truck and left the cables hooked up for about 45 minutes. Finally got enough charge on the battery that the Emergency Start switch gave it enough punch to start.

Good luck.
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Old 02-01-2019, 06:24 PM   #4
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THOR #6903
You will need to hold the switch about a minute before trying the starter if the batteries are low

Keep on pressing while attempting to start the engine

Having the generator running really helps keep the voltage up
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