Driving down the road yesterday and both rear speakers just quit. No crackling at all. Did a little troubleshooting today and determined the problem is not the delco radio, but rather wiring or the speakers themselves. Before I start pulling things apart, I figured I would ask here. Where is the wiring harness located from the radio itself back to the speakers? Under rocker molding? The car is a bone stock 85 iroc.

Thanks

 

Check this block behind your radio,one of my wires became loose and I lost the left front speaker.On my TA all the speaker wires join there.