geordie said:
Like Red Barchetta I'm running the Ignitor II and have some problems starting.
1. How do you measure the voltage across the ignitor?
2. How do you identify if you have a resistor wire there. I don't mean by color, how do you measure the wire resistance?
3. What's involved in getting rid of the resistor wire? How easy is it to get behind the dash on a '65?
I didn't measure voltage "across" the ignitor, just how much was going to it. Just get a multi meter and measure the voltage going to the ignitor. I measured where the positive wire for the ignitor is connected to the coil, as this is also where the coil takes it's power from the ignition switch.
To measure resistance, you need to connect one side of your multi meter to the positive wire going to the coil, and the other side to the switched 12 volts ignition wire from the ignition switch. Do this with the power off. You do not want the ignition switch on while measuring resistance.
It would be easier if I had a diagram. I do not, but this person has one for a '66:
http://www.hammar.dyndns.org/~djhamma/wiring.htm
I didn't link directly to the image as I don't want this person's site to get hammered. But if you click on the 1966 Mustang Ignition, Starting and Charging schematic, you can see what I mean.
I don't know exactly what the differences are in wiring between a '65 and '66, but the should be very similar in regards to the ignition. If anything, the '65's may not have the resistor wire as for some reason, I think I've heard they added this later on.
Start by connecting one end of the multi meter at the #16 wire (red-green) wire at the ignition switch. Then connect the other end at the #16 wire (again, red-green) on the positive side of the coil. From there, you should be able to measure the amount of resistance your ignition is experiencing.
Remember, this if for a '66, your colors may be different.
It can be a pain to remove the resistor wire as you might have to fish it out of the wiring harness. I ended up completely replacing the wire from the ingition to the coil, replacing a couple of connectors along the way.