I'm wiring up an aftermarket stereo in my '04 GP GT. No premium stereo or anything. The last stereo I had in this car didn't work with the AM radio and as I put in a new one I realized it's because I didn't connect a wire for turning on the antenna amplifier for AM reception. This wire doesn't come out through the standard adapter harness so I'm trying to find it in the stock harness but I can't find a reliable wiring diagram that points out which wire it is. Anybody have any idea?