I'll try and share as much information as I can here. The harness in my 74' was absolutely trashed so I had to replace it. My 74' is fitted with a 77' 2F and 4 speed. I sourced a near perfect condition 77' harness and threw it in my 40. Everything works... the blower, the wipers, the hazards, etc. but it will not start.
I have attached the large black with yellow stripe wire to one end of the ballast resistor.
I have attached the other end of the ballast resistor to the positive terminal of the ignition coil.
I have attached the starter bypass wire (black with white stripe) to the positive terminal of the ignition coil. (Green wire pictured was just an extension)
I have attached a wire from the distributor to the negative terminal of the ignition coil. (Red wire pictured)
Some important things to note:
*The truck was running fine with the same setup using the old harness but the only thing I remember is that one end of the ballast resistor was connected to the negative terminal of the ignition coil and the distributor wire was connected to the other end of the ballast resistor. Everything I have read says this is wrong but it ran great!
*I tested resistance across the ballast resistor and got 2 ohms.
*I got 5.8 volts at the positive end of the ignition coil when key was in on position. (The black/yellow stripe ignition wire is hot with key in on position)
*The ballast resistor gets hot with key in on position.
*The white with black stripe wire that branches out of the harness with the ignition wires was bolted to the chassis.
*There is a small black/yellow stripe wire that branches off of the thick black/yellow stripe wire with a condenser attached. I don't know where this goes.
*I have not yet hooked up my alternator but I don't think this would be an issue.
I have wired it like pictured (from 1974 FSM):
Thanks for any input you guys may have. I just can't figure out for the life of me why it's not starting. I feel like I have done everything correctly!
I have attached the large black with yellow stripe wire to one end of the ballast resistor.
I have attached the other end of the ballast resistor to the positive terminal of the ignition coil.
I have attached the starter bypass wire (black with white stripe) to the positive terminal of the ignition coil. (Green wire pictured was just an extension)
I have attached a wire from the distributor to the negative terminal of the ignition coil. (Red wire pictured)
Some important things to note:
*The truck was running fine with the same setup using the old harness but the only thing I remember is that one end of the ballast resistor was connected to the negative terminal of the ignition coil and the distributor wire was connected to the other end of the ballast resistor. Everything I have read says this is wrong but it ran great!
*I tested resistance across the ballast resistor and got 2 ohms.
*I got 5.8 volts at the positive end of the ignition coil when key was in on position. (The black/yellow stripe ignition wire is hot with key in on position)
*The ballast resistor gets hot with key in on position.
*The white with black stripe wire that branches out of the harness with the ignition wires was bolted to the chassis.
*There is a small black/yellow stripe wire that branches off of the thick black/yellow stripe wire with a condenser attached. I don't know where this goes.
*I have not yet hooked up my alternator but I don't think this would be an issue.
I have wired it like pictured (from 1974 FSM):
Thanks for any input you guys may have. I just can't figure out for the life of me why it's not starting. I feel like I have done everything correctly!