Factory Radio
I assume that there must be different factory plugs on the two radios. I was under the impression that the older style ford stereo plugs were the same from the mid-nineties back to who knows when (a black plug and a gray plug, unless I am thinking of chrysler). Assuming this is not the case, I would go to the ford dealer and see about getting some stereo replacement plugs for the radio you want to put in. I had to fix up a a stereo install a while back for a guy who cut his factory plugs off and hardwired an aftermarket head unit into his car. He later wanted to sell his car with the factory radio, but there was no way to hook it up since he threw the original plugs away. I ended up going to the Dodge dealer, and I was able to get a set of factory plugs for about 12 bucks. I was then able to hook the new pigtail plugs up to the wires hanging in the dash and reconnect the original radio.
In your situation, you would need to get the plugs for the 1990 probe radio, and hook those wires up to the ones in your truck. If the factory plugs are still in your truck, you will have to cut them off. One word of caution: don't trust the wire colors on the new plugs to match up with the old wires in the truck. While some colors are probably the same, you dont want to risk hooking up a power lead to a speaker or something. Get a wiring diagram for you 1979 audio system and for the 1990 system and match them up. The Ford dealer should be able to make a photocopy of the wiring color diagram out of their shop manuals. Otherwise you can call crutchfield if you are one of their customers - they are a great resource.
Jerm
Does that make sense? What I mean is to get the plugs that fit the radio, get the plugs that fit into the trucks connectors. Splice the two connectors together and then it should be just a plug in job.
Roger Lane
Test Analyst
Sr. Automated Test Engineer



