I have the factory stereo for my 75 hilux. previous owner had an aftermarket deck in it. having trouble figuring out how to wire it back in. if anyone has pics i would really appreciate it. mostly confused because there is only 4 wires coming out of the stereo. was there a splitter or something for the left/right output?

 

Ok. Had some time this weekend and got it figured out.

lt blue = power
Blue = right positive
Green = left positive
Black = negative for left and right

Stereo itself grounds through the antenna.