Need help installing aftermarket stereo, Cant figure this out... Options

[HX_Guy]

Man...these Toyota's are confusing!

Here is the deal...Im trying to insall an Alpine CD deck in a 1994 Celica GT with the premium sound (stock amp). I went to Best Buy and bought a wiring harness (part number Metra 70-1761...looks like this: http://store5.yimg.com/I/logjam_1701_3450239 ).

I know youre supposed to bypass the stock amp which is located under the AC/heater controls under the stock stereo correct? The stock amp has 3 plugs in the side of it (1 plug goes to the stock stereo...other 2 go into the car's wiring harness it appears).

The problem is...the two plugs that come out of the stock amp do not match the Metra 70-1761 wiring harness plugs. Am I working with the wrong plugs? Are there some other plugs I should be using?

[HX_Guy]

Well...I found a new harness (Metra 70-8112) which plugs right into the one-plug harness used with the premium sound systems (plug that plugs into the back of the stock deck).
The harness has wires for 12V, ACC, Ground and Remote Turn-on...and then has RCA jacks that are supposed to be plugged into an aftermarket stereo.

Im sad to say tho...that for some reason it isnt working.
I hooked up the power wires and the new deck turns on...but there is no sound coming from the speakers...not really sure why, because it should work. I might try and splice into the stock speaker wires before the amp and see if that works.