Allright, this is a tuff one. Anybody know what the difference between an '84 GP and '86 GP instrument panel wiring harness is? I called a local dealer to get part numbers hoping that they both use the same loom but they don't. The '84 uses part number 12049287 and the '86 uses 12058047. The instrument panel instrumentation is no different between the 2 cars. The reason I'm asking is that I wanted to swap the '84 harness into the '86. Someone had been behind the instrument panel before and chopped some wires to put in an aftermarket stereo. They aslo did something with the dome and courtesy lights. When I removed the instrument panel someone had joined the 3 white wires which feed the door switches and dome light to another white wire which I'm assuming is the feed. It was soldered, glued and taped....not the way the factory would have done it. And they don't work. I did put a meter on the wires to check for continuity and the wires are ok and when I push the door switch in the meter goes to zero just as it should. So because there are several issues with the '86 wiring harness I was just going to swap the '84 into the '86. But now I'm not sure based on the different part numbers. Can anyone help with this?