Hi everyone! I am new to the Forum and could really use some help. Did my first engine swap this past week and am at a standstill with an electrical issue. I was driving an 88 C1500 with a 305 in it but the body and frame just about had it, so I bought a 94 C1500 with a 4.3 that had a blown motor and the Tranny was bad, and pulled the motor. Everyone I talked to said the only thing I would have to change is the Motor Mounts and the computer and I could then put the 305 motor in. Well, that turned out to be wrong as I had to use the engine wiring harness from the 88 also, but heres the problem, I didn't realize that the plugs weren't the same where the wiring harness under the dash is, and the other truck got scrapped already. The truck starts and runs fine, but the alternator is no longer charging and was fine before the swap, and I don't know what wires go to what in the under dash harness. Can anyone give me a clue as to what each wire in the c200 connector is for on the 94, and the 88? Some of the wires in both connectors are the same color and others are different. The ones that were the same I connected together, but I am left with 4 or 5 wires on the 88 harness that don't match the 5 or 6 wires on the 94 under dash harness. I really need to get this completed and can not afford to take it to a mechanic. Do I have to get an 88 wiring harness for under the dash? And if so, will the plugs from that even fit in the 94 dash? Or will I have to replace the entire cluster panel and convenience center also? Any help would be greatly appreciated.