Originally Posted by SteveNC

For what it is worth, soza127 posted this for me back when I changed out the head unit and wanted to use the RCA output of the new deck with the factory amps.

The GSL-SE Stereo System

The page is a little old as it mentions Radio Shack offering the DIN connectors - they no longer offer them. If you go this route you'll need to get a set from a junk yard or buy them from a real electronics parts store. Personally I don't like the idea of cutting any of the factory wiring and making splices because that makes it difficult to put it back the way it was. Also, IMHO someday these cars will be worth more in the real market than they are in our heads and some collectors will want to restore to original condition.

Originally Posted by ioTus

The graphic EQ receives one 8 pin DIN from the tape deck - which is the main source and power of the stack - and sends one 8 pin DIN out to the tuner - which is the main output, balance, fader (when no joystick) and master volume for the stack.

As you see there's only a single output passthrough (+ and -) on the DIN going to the tuner.

The way I got around this in my install is by fabbing up a 6-pin DIN-to-RCA (red white) and using an aftermarket amp. The 6-pin din replaces OEM output that would normally go to the joystick. You can get a 4 channel amp for cheap that will far outperform the OEM amps. The amp will either divide the EQ'd signal 4-ways, or you can get Y splitters and split the stereo signal to the front / rear inputs on the amp.

There's a bit more to it than this, but thats the basics. If you want to know what more there is to it, i can ramble on a bit more if you like

Originally Posted by k4adams

Could you take the 6-pin DIN cables and split the wires? There's a diagram for the pin layout, so could you not take the 2 DIN cables going to the joystick/amps and hook up an aftermarket stereo that would still let the joystick work properly? I really want my joystick to work.