I found in search that the yellow wire is constant and the blue wire is ignition. I have it hooked up this way (91TT w/bose if that matters - i am replacing head unit and speakers completely bypassing bose stuff) and it won't turn on. BUT it will turn on if I squeeze these 4 wires together (the blue and yellow from wiring harness, and the ACC and 12v from headunit). Music comes from all speakers, but if you turn car off then on, no settings are saved and head unit is off. I know this is wrong, just mentioning something I noticed. Any reason why it isn't working when hooked up correctly?
Follow Ups
In middle of head unit install...question.. - Mike87T13:59:51 08/12/08