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  #16 (permalink)  
Old 01-13-2012, 12:09 AM
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You should always wire it thru the Brake Switch as the factory did.
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  #17 (permalink)  
Old 01-13-2012, 01:04 PM
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Quote:
Originally Posted by dieselnut
my vehicle is completely stripped of all the "factory" electrical stuff. everything is on switches now, the "brake" switch has a normaly closed switch but when you press down on the brake pedal it goes to an open switch, any reason why i shouldnt wire my tcc through that switch?
Since you already have the normally closed switch incorporated in your brake light switch, you won't need to use the relay. My T-bucket has a pressure switch to operate the brake lights, which is why I had to use a relay. I don't remember if I gave you the wiring diagram earlier, so here it is. Remember to ground the wire connected to the 'D' pin. Big Al
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Old 01-14-2012, 07:24 AM
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Quote:
Originally Posted by dieselnut
my vehicle is completely stripped of all the "factory" electrical stuff. everything is on switches now, the "brake" switch has a normaly closed switch but when you press down on the brake pedal it goes to an open switch, any reason why i shouldnt wire my tcc through that switch?
Are you sure about that? Usually the brake light switch is NC. When the pedal is up, not being pressed, the switch is open, depressed, no brake lights. When you press the brake pedal the switch closes and lights the brake lights. Just the opposite of what you need for the TCC. That is why the relay is used.
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Old 01-14-2012, 06:31 PM
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Quote:
Originally Posted by Overdriv
Are you sure about that? Usually the brake light switch is NC. When the pedal is up, not being pressed, the switch is open, depressed, no brake lights. When you press the brake pedal the switch closes and lights the brake lights. Just the opposite of what you need for the TCC. That is why the relay is used.
The GM switch listed in this diagram has four contacts. for both normally open and normally closed, which it appears, that is the same switch that the OP has.
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