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Bill OH · 10-05-2020, 04:31 PM

As I stated initially, I had to reverse the leads on my Snap On unit because of the positive ground system. You tried!!! I have no more ideas. I was not aware that a dwell-tach had to have battery power. I thought that the only reason that your unit used a battery was to determine system voltage. My Snap On does not need a battery. I am interested in your progress in getting your unit functional. Keep us posted!!!

10-05-2020, 04:31 PM	#11
Bill OH Senior Member Join Date: May 2010 Posts: 426	Re: engine analyzer questions As I stated initially, I had to reverse the leads on my Snap On unit because of the positive ground system. You tried!!! I have no more ideas. I was not aware that a dwell-tach had to have battery power. I thought that the only reason that your unit used a battery was to determine system voltage. My Snap On does not need a battery. I am interested in your progress in getting your unit functional. Keep us posted!!!