2005 Mustang MSD8913 Dis-Tach Driver. Anybody have one working?

[Jerry Stoneking]

I have a 2005 Mustang with an MSD 8913 Dis-Tach Driver spliced into the #8 coil positive wire, and not getting a signal. Sooo, either I am doing something wrong (most likely), or the MSD Dis-Tach does not work. Need help.

 

[Juice]

The positive wire is not an rpm signal, its switched 12v.
The ground is what gives you an RPM signal.

 

[Midlife Crises]

Exactly what juice said. The positive side of the coil is hot all the time when the engine is running. The negative side pulses and will provide a signal for your accessories.

 

[Jerry Stoneking]

Here is how's it done for anybody else trying to do this.

AutoMeter created a step by step how to video on how to locate the wires that is awesome. This works for MSD 8913 Tach Adaptor as well. See link below:
www.autometer.com/blog/installation-guide/05-09-ford-mustang-autometer-tach-adapter-9117-installation/

MSD general instructions:
https://documents.holley.com/8913.pdf

AutoMeter general instructions:
https://www.autometer.com/pub/media/manual/2650-561X.pdf

Also, pay to $10 and have the wiring schematics:
https://portal-diagnostov.com/en/