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I would also be suspicious of the switch as it may be overly sensitive to the residual pressure and not changing state instantly.
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I agree with HH56 comment above.
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Also, I believe that some Volkswagen brake switch is tri-prong with the same functionality (right, Keith?). One can also use a regular OTC 2-prong switch and a Radio Shack relay to duplicate the functionality. Someone up at NW Packards in PI sells a kit like that, IIRC, if you do not want to tackle the electrical circuit. I have this solution on my 55 Pat and mounted the relay inside the passenger compartment to keep it away from exhaust heat. It's still working after 5 years. I don't have the BTV either.
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Then, of course, there's the manual override DPDT switch, which can be used in conjunction with the auto system. There are many possible ways to wire this.
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There must be an earlier thread on this set of solutions or was that before PackardInfo?
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Craig
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