1929 Plymouth Ignition Coil Testing Info

[29plycoop]

Chris - Thanks for the spare parts. They arrived Friday. Have not had a chance to work with them as yet. Will keep you updated. -  Rich

[chetbrz]

Here is a quick sketch of a 29 distributor coil.  The ignition switch needs to be closed in order to provide power to the Primary and Secondary internal coils.  The so call Gas or Accessory post is connected to the closed power side of the coil's ignition switch.  So by providing power to the Gas lug you are in essence.., bypassing the ignition switch.

My Quick Diagram:



I hope this helps,  Chet..