Just bought a 92 Explorer 4X4

[RamblerJW]

I just bought a 92 Explorer and I'm having some trouble. I can't find a wiring diagram for putting in a new head unit for the sound sytem. I can get power to the unit, but I'm lost as far as the speaker wires go though. I have tried every combination I can come up with, but none of them work. Any suggestions?

[tankdxz]

Sup,
I learned this the same way your doing it, but I got some advice.
The factory speaker wire has two wires for each one the negative wire is the one that has a black line down it,there both going to be the same color though, All you have to do is figure out which wires are the rear speakers.

[BigBadWimp]

Unless your stereo is like mine and none of the speaker wires at the harness are the same color AND you pulled out a speaker to try and get some hints there only to find that those colors are completely different from any of the colors at the harness.

Anyway, I cut the thick grey wire that holds all the little speaker wires and then found out that I shouldn't have? Is there an amp somewhere in my '94 Explorer that I can take out and then replace all my wiring? This boy's quite frustrated...