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Old 11-18-2020, 01:41 PM
m5mulli m5mulli is offline
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Join Date: May 2012
Location: Arkansas
Posts: 40
Well. Resistor has been replaced but that still didnít help. While I had things appart I decided to check the output voltage from pin 3 with the amp installed and the engine idling. Itís outputting about 400-500mv and goes up as I rev the engine. So thatís a good sign but I am not sure if those ranges are correct.

I guess the next thing is to pull the instrument cluster and see if the tach is even connected

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