Fastjeff wrote:Uh-oh! May have spotted a problem.
As I read your post, you are running the Chrysler ignition modules. If so, the modules MUST use a resistor, regardless of how many pins it has. The module was NOT designed to run on a straight 12 volts and will eventually fry itself. (Guess how I found THAT out!)
A word on the 4 vs. 5 pin ECMs (ignition modules); Being super anal, Chrysler engineers set them up to run on two voltages, approximately 9 volts AND approximately 6 volts. That 5th pin in the module--and the second path through the ballast resistor--was for that 6 volt circuit. It was totally unnecessary and eliminate in CARS and trucks in later models.
I have traced these wires from the dual ballast resister and one side goes to the coil and one side that is not used goes to the missing pin on the four pin module.