i was having trouble but i figured out what was wrong, the truck had a 6 cylinder to start off with, someone swaped a 350 into it,so i was thinking since it had a 6 cylinder i should be going off the 6 cylinder diagram. well that wasnt the case. i guess they must have swapped the engine harness as well? any ways who knows. the problem im having now is, in the 8 cylinder engine diagram, i cant seem to find the wiring area where the wires come out the firewall and goes to the blower motor, resistor, and that relay. i looked on every diagram can someone help? its an 82 chevy c10 short bed.