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Old 05-06-2017, 05:13 AM   #1
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Brand: Thor Motor Coach
Model: Windsport 29M
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THOR #6613
Tail lights on but don't brighten when brake is pressed

Has anyone ever come across this? All of the lights are on so they aren't burnt out- they just don't get any brighter when you apply the brakes.
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Old 05-06-2017, 05:44 AM   #2
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THOR #6705
brake lights

Hi, Kels. Are the bulbs led or standard? If they are a standard bulb, they have 2 filaments in them. 1 for tail and 1 for brake. If that isn't it, it is probably the brake light switch behind the brake pedal.
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Old 05-06-2017, 11:50 AM   #3
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THOR #1150
You could test the 7-wire plug brake light pin: If the voltage there changes when the brake pedal is pressed then the problem is with the lights or the wiring to the lights.

An easy way to test the 7-wire plug is with a 7-wire tester (Amazon) you also can pick these up at auto parts stores.
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Old 05-08-2017, 02:15 AM   #4
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THOR #2817
Check the brake light switch. It's probably near the brake pedal. It might need an adjustment or replacement.
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Old 05-08-2017, 03:53 AM   #5
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THOR #6613
They are LED. We cannot find the brake light switch!
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Old 05-08-2017, 04:04 AM   #6
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THOR #3952
Press on the brake pedal with your hand and you should here a clicking noise.
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Old 05-08-2017, 12:46 PM   #7
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Given the differences between Ford's quality and Thor's quality in general I would suspect that it is not the switch at the brake pedal (that would most likely be Ford's responsibility).

Thinking on this further: Have you tried the turn signals or the emergency flashers? If it doesn't flash for either of those I would suspect the wiring to the lights.

Another way to check the brake switch at the pedal is to get an OBD-II interface and watch for the brake switch input (On Ford's I believe its called "BOO"). Since the switch goes to a module then the signal is sent out on the CAN bus.
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Old 05-08-2017, 02:41 PM   #8
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THOR #3952
I just went out and pressed my brake pedal. You should hear a definite clicking noise from a relay in the fuse panel. Another way you could check is hook up a boat or utility trailer and see if the brake lights work.
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