I'm doing a hardwiring project in my E92 that is not a GPS or radar detector.
I have a T-tap to the constant power in the overhead console (which I can agree with anyone else who has removed it that doing so is a major PITA...) and another cable connected to the ground bolt. The switch I'm using lights when on, so I know it is getting power, but the device doesnt power on and I suspect it is because it needs an actual ground (negative) cable instead of just a grounding bolt. I've installed the same thing in my E46 and the ground color was brown in that one (
e46 wiki) so is it safe to say that the brown wire in the same bundle with the constant 12V is the negative/ground ?
I'm not trying to T-tap two power wires and send my $400 gadget to eletronic heaven.
