No coil spark

Using a voltmeter, what is the voltage to the positive side of the coil with the key in the "on" position?

Is there any kind of history that may have influenced this problem?

The Medic

I did test the positive side with my meter and had voltage there. I read that both wires to coil should have power when key is on, so I am unclear about that. should the negative side have voltage or no voltage when key is on?
Thank you!

Why did we install the new coil?

The Medic

Without digging for anymore information right now.

This would be my first guess to a sudden engine death and then discovering spark is not present. Like I said, best guess without further testing. See link below:

https://shop.advanceautoparts.com/p/msd-ignition-module-ford-tfi-for-8452-8453-8456-83648/10211626-P?searchTerm=ign+module

To make things a bunch easier,

One of these puppies does the trick! See link below:

https://shop.advanceautoparts.com/p/autocraft-ignition-module-tool-ac666/10051084-P?searchTerm=ign+module

Insure you use some of that heat sync grease behind it, so that heat will dissipate through the distributor body.

Keep us posted.

The Medic