Howdy guys, I have a question regarding ignition parts because I can never really find this info anywhere. My question is how do you test, preferably with a multimeter, an external electronic spark control module (ESC). Im mostly curious because I have an intermittent timing issue at times and the only part that isnt brand new in my ignition system is the ESC. Whenever I try searching about the ESC most stuff comes back to the ICM instead inside the distrubutor. Ive seen others ask on other forums but never have seen a straight answer. Thanks.