Need wiring schematic for radio

Here you go...

You go to any Autosound stereo installer shop or go online and buy the jumper harness that allows you to plug the radio into the original scar harness.

Not sure I understand your question. Did you buy a harness adapter for GMC, or are you trying to just cut the connector off the factory radio and solder it to your CD player? If the latter, below is the color code for your factory wiring.

1994 GMC Sierra C1500 Car Radio Wiring Schematic
Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black/White
Car Radio Illumination Wire: Brown
Car Stereo Dimmer Wire: Gray
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue

http://www.modifiedlife.com/1993-ford-mustang-car-audio-wiring-schematic/

go to a store were they sell car stero an take your radio an tell them u need a wiring harsent to plug in the radio an plug into the plugs on the car you have dont go to walmart the dont sell them its going to be from car stero store.

http://www.modifiedlife.com/1996-oldsmobile-cutlass-ciera-car-stereo-wire-schematic/

Your best bet on that one is to go to a place that sells car audio systems or even some autoparts retailers have them,and get the proper adapter harness already made up. A few more dollars but, a whole lot less headaches.

If your installing a stock radio/cd player from another Dodge the wiring plug is the same and will fit.If your installing a aftermarket radio/cd player(JVC,Pioneer,etc)you will need to buy a adapter plug that wires up to the radio and is a direct fit to your factory wire harness,so your not cutting your wires.When you buy the adapter plug it comes with a wire diagram of which wire is what.Your aftermarket radio should have a diagram also,either on it or in the manual.Hope this helps you.

First you need to UN DO your first hook up. Put it back the way it was before you splice. You have evendently spliced the wrong wires. Without schematics colors and stripe won't mean anything.

Be thankful you haven't damaged anything or burn something out in your control module.

You need to find the schematic wiring for the radio.

Or if you have a taple player in the radio, by the tape adapter for CD player. Until you can find out what wires PRE AMP the tape player then you can splice.

If installing Toyota radios/CD Players they just plug in regluar sockets in vehicle.
If installing Non-Toyota radios/CD Players youll have to buy a wiring kit from Wal-Mart/Circuit City/etc it would have the wiring diagram in it.