The goal is to have the KEY 1 (and KEY 2 if you have two input wires) wire go to one side of the SWC and the black wire connected to the other side, this is the side that would go to the factory radio.
This setup worked on my 1995 Pontiac Firebird and should work on any car that uses resistance values for the SWC. It will probably not work on later model CANBUS cars w/o an adapter. It is helpful to have a shop manual or wiring diagram so you know what wires to modify. In my case, I was able to remove the +12V reference wire and substitute the KEY 1 wire, then route the factory output wire to the SWC ground wire.
Statistics: Posted by 20160203 — Mon Feb 08, 2016 3:04 pm
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My car has a +12V yellow wire that is the reference signal for the SWC.
My car has a blue wire that is the ground signal for the SWC.
I am going to substitute the brown wire for the yellow wire and connect the blue wire to the SWC ground. I have attached a diagram for reference.
Statistics: Posted by 20160203 — Thu Feb 04, 2016 2:13 am
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1, yes, please connect the SWC-GND wire to the original car SWC GND wire.
2, yes, this wire is require to be connected with GND wire from the harness. But if you do not connect, it is also no effect. So it depends on you.
3, yes, the reverse wire is for reverse signal detective. You should connect it to the positive pole of the car reverse light. So it only have power to trigger the radio to switch to rear camera function when the reverse lamp light up when you engate the reverse gear of the car.
Regards!
Statistics: Posted by Andy — Thu Feb 04, 2016 1:43 am
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2) Brake input: Does this need a ground signal when the parking brake is applied?
3) Reversing input: Does this need a +12V signal when the car is in reverse?
Thank you.
Statistics: Posted by 20160203 — Wed Feb 03, 2016 2:09 pm
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