Posted by Bob N.Y. on November 23, 2021 at 14:06:20 from (154.27.215.209):
I am still working on the 1930 Model A Ford doodlebug that I am trying to resurrect after it sat outside in the elements for 20 years. I did some preliminary checks today in hopes of trying to start the engine tomorrow. I think there is a problem with the spark. It was originally a 6 volt positive ground system, but was converted to 12 volt negative ground before I ever saw it. I am staying with the 12 volt negative ground. Question 1: With the key on but engine not running, should the voltage on the distributor side of the coil be the same as the battery side? Question 2: If the voltage on the dist. side is considerably lower than the batt. side, does that mean the coil is hooked up backwards? Question 3: Is there a difference between a coil designed for positive ground and one designed for negative ground? Thank you.
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