I have a 99 suburban with 5.7 L 4wd.

I'm trying to test the ignition module using the Actron sensor tester Pro. The manual shows the 4 pin GM module as the module in the distributor with 2 connectors on each side. I have the external control module that is a 4 pin with a single connector with 4 pins in a row. see image below. I don't know how to connect this tester to the module to check. I haven't been able to find a pin out diagram for this module. If you can help I'd appreciate it.

thanks,
Frank

[IMG]local://upfiles/15129/1D18EABC632D4B3C828E9E99E0A9F89E.jpg[/IMG]

 

Autozone, and I thinkO'reilly's or Advance Auto have testers and they will check it for free.