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Brake Light Switch Wiring

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Old May 17, 2009 | 09:40 PM
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Default Brake Light Switch Wiring

I'm installing a 200-4R transmission from BTO, and need to tap into the brake light circuit (for Bosch Relay and lock-up). For a '78 with cruise, can anyone tell me the correct wire to tap into from the brake light switch? Also, if there's a better place to connect into the brake light circuit, I'd be interested to hear as well. Thanks for any help!
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Old May 17, 2009 | 09:54 PM
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This may help - http://www.nrjvette.com/johdotukset/...tte%201978.pdf
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Old May 17, 2009 | 10:57 PM
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Not sure exactly what you are looking for but the white wire is made hot when stepping on the brake pedal.
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Old May 17, 2009 | 11:26 PM
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Thanks bluthundr - these diagrams will be very useful.

DWncchs - that's exactly what I was looking for. Torque converter unlocks (in OD) when pressing on the brake...to make this happen, the TCC wiring taps into the "brake light circuit". That's the circuit I was looking for coming out of the brake light switch (made hot when pressing on the brake).

Last edited by PSU88; May 17, 2009 at 11:45 PM.
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Old May 18, 2009 | 08:44 PM
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Here's a better 78' wiring diagram. Much easier to read. It is the white wire as DWncchs said.

Gary

http://www.corvetteforum.net/c3/tune.../index12.shtml
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Old May 18, 2009 | 10:56 PM
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Thanks Duke94 - Diagram is very easy to read. Appreciate your help. This is my first "C3" project, and everyone here has been very helpful. Like others, I started with the "rear end", and ended up pulling the engine. I'm just looking forward to the day I can take the jack stands down and take it for a spin.
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