car stereo wiring

Anybody know the speaker wiring diagram for a old Pioneer Super tuner am-fm cassette model KEH-1818. Somebody gave it to me but no diagram for the speakers, there are two grey one w/tracer, two green one w/tracer. Ive tried different combos and it doesnt work right. Maybe its junk? I'd like to make it work because it fits in my dash without cutting it up anymore. Any help would be appreciated. Also the power and amp wires are marked so I have those covered.