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BeachJoshua

'03 Trailblazer Wiring Harness [Head Unit] [Solved]

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There's the big one that goes into the adapter then the head unit, but there is a small one, and we plugged the normal one into the head unit, no dice, but there is a small one that we don't know if it needs wired in some how.

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the red wire in that car does not turn off and on with the vehicles ignition due to it having a data turn on for the factory radio you have to get a switched power source for the red wire of the radio i usually wire it to the THICK BROWN wire of the ignition harness behind the knee bolster with a 10 amp fuse on it for saftey

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its for onstar and steering wheel controles u dont NEED it

No such thing in this one...

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the red wire in that car does not turn off and on with the vehicles ignition due to it having a data turn on for the factory radio you have to get a switched power source for the red wire of the radio i usually wire it to the THICK BROWN wire of the ignition harness behind the knee bolster with a 10 amp fuse on it for saftey

i think he is askin about the small square plug on the factory side. but yes u are correct

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you can pull a switched power line out of your fusebox as well, if you want to. just get in there with a DMM and start turning the key on and off, see what works

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you can pull a switched power line out of your fusebox as well, if you want to. just get in there with a DMM and start turning the key on and off, see what works

We already solved it, mom's Trailblazer against her will now has two tens... :D

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