Switch under sterring wheel
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Joined: Oct 2015
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Switch under sterring wheel
I just bought a 1986 F150 300 inline 6 and noticed a black box with a big white switch that moves left/right it has a metal tube that comes out the back of it and goes into the engine compartment but isn't hooked up to anything, anyone know what this is?
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Joined: Jan 2001
Posts: 56,978
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From: Virginia
It could be a old timey trailer brake controller. The old ones actually hooked into the brake line at the master cylinder. The lever is a manual control where you can reach down and manually apply the trailer brakes only.
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