Here you go, I originally posted this on jeepforum about a month ago.
From the sticker on a 1988 factory Jeep radio (says Jeep all over it) wire colors verified on factory harness.
Battery = Red w/tan stripe
ACC/IGN = Purple w/orange stripe
Power Antenna = Gray wire
Panel Dimmer = Orange w/black stripe
LCD Dimmer = Blue w/ white stripe
Left Rear + = Green w/white stripe
Left Rear - = Brown w/white stripe
Right Rear + = White w/black stripe
Right Rear - = Brown wire
Left Front + = Green wire
Left Front - = Black w/yellow stripe
Right Front + = White wire
Right Front - = Black wire
The radio got its ground (-) from a seperate black wire with a spade lug connected directly to the radio chassis
I used this diagram on the factory radio to successfully wire in my aftermarket radio.
I would still recommend taking a volt meter to these colors and testing them just to be sure the voltages are right depending on ignition key position etc.
The dimmer wires will pretty much be useless to you because most aftermarket radios don't support this feature. The power antenna wire may or may not be there depending on whether you have a power antenna, mine had it but I converted to whip antenna so it was another wire I didn't need.
Hope this helps.
Mark