2004 chevy trailblazer_lt_ext
im trying to wire a H/U in a 1990 plymouth laser, the previous owner hacked the wiring harness to the radio. we figured out all the speaker wires etc, but 2 wires are throwing me. 1st is a red with black stripe, im thinking POWER. the 2nd is blue with orange markings. can anyone help, everything im finding are links to buy a dvd.