Recently bought a 93 Celica convertible. The radio had been replaced with a decent Pioneer unit (the original radio was in the trunk) butthey only connected the dash and rear seat speakers. It appears there are 2 speakers in each front door, a large one at the bottom and a tweeter up high. I'm thinking that the door speakers might sound better than the dash speakers. Before I pull the radio to see what's left of the original harness is there an accessible copy of that part of the wiring or at least a list of the color codes for the radio?