Reply to "A simple tester for original Tachometer"

I have had several of the MSD 8920 Tach Adapters fail. After burning out a couple of them, I researched the issue and MSD explained that charging the battery can sometimes fry the unit. After reading such, I began disconnecting the battery ground cable when charging. I figured that if charging the battery can damage the 8920, then other electrical components might be at risk. I have not fried an 8920 since then.

My Pantera project that I received early last year might have a fried 8920. The tach is not working but I have not started isolating the problem yet.

1/16/251:19 PM

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