I got a '95 ETC with the non Bose cassette player/radio and it has an amplifier in the back like the Bose version. I just took out the radio today and it turns out it's not the 21 pin harness which I thought it would be, instead if was just a 2 piece harness with 4 wires on one and 8 wires on the other, I thought the one with 8 was for the speaks and the one with 4 for 12+, ground, accessory, and power antenna, however i was wrong. turns out that those wires are something like a controller to the amplifier in the trunk that goes with the stock stereo. I wanted to install a CD player and now i guess ill have to since I pulled out the stock one already and cut the harness plastic off of it to use it as a harness for my after market stereo. I've seen harnesses for this and they are basically 20 feet long cables that run from the head unit back to the stock amplifier. I'm probably going to run my own cables to the back through the firewall on the passenger side, it's just that now the problem comes in HOW TO TAP INTO THE STOCK AMP with the after market stereo to make it work. I would appreciate all the help I can get. Thanks in advance.