Purchased this along with the 94-02 Delco CD player for an 87 El Camino who's original harness is long gone. Only hiccup came from the illumination and dimmer wires. Both the 87 wiring diagrams and random 94-02 wiring diagrams I looked at list gray as radio illumination and brown as radio dimmer. Hooking the Camino's gray to plug gray and brown to brown and turning on the lights only blanked the radio display altogether, but to otherwise no ill effects. The radio kept on playing, and turning the lights off brought the display back. Swapping gray to brown and vice versa brought about the intended button back lighting and display dimming. The plug I purchased appears correct, and I can't fathom why any previous owner would swap these two wires, so I don't know. Take this for what it's worth. You adventurous types who can't use the direct 89+ 20-pin radio to pre-89 12-pin adapter, this could be a an inconvenience that sets you back a minute.

Rating: [5 of 5 Stars!]