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Possible to rewire brake switch so that it works when ignition is off?
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Question
timmerk
Is it possible to rewire brake switch so that it works when ignition is off on a 2008 GMC Sierra? I see the switch has 4 pins/contacts, but I couldn't find anything about the brake switch in the service manual (maybe I just missed it?). I'm guessing there is not a CANBUS transceiver inside the switch because of the large size of contacts. Does anyone know the pinouts? I'm guessing one will be an ACC or ignition power supply, and that I could just change it to an always on supply. Any suggestions?
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