Originally Posted by fordman777
No thats not correct....if im not mistaking your coil gets fire before your dizzy.....right??????
Just for reference...
In that generation Ford used a magnetic pickup in the distributor. Little iron vanes pass by poles on a coil of wire, and this changes the magnetic flux in the coil causing it to generate a voltage. It's a very trouble free system.
You can identify that type because it has two wires exiting the little coil inside the distributor and three from the distributor itself. Violet, black, and Orange. Black is the ground (you can follow it by eye to ground, the other two to the coil). The black should have NO continuity to any other wire when the distributor is unplugged.
That voltage triggers the Duraspark module.
You can ohm the pickup with an ohmmeter, or spin the distributor and read the voltage on a low voltage AC voltage scale to see if the pickup is good.
The Duraspark gets hottest when sitting with the key on and the engine stalled. The faster you run it, the cooler it gets. So the way you hurt the module is to sit with the ignition on and the engine stalled. You can also blow it out by jumping voltage to the coil primary. If you are going to do that, unplug the Duraspark.