I have not started the engine yet, I am wiring up all the electronics before I can close our my avionics bay, I have a bit more work on plumbing the gasoline, so I can't start until I do.

Is there anyway to verify the RPM is wired correctly without getting the engine fully started? Will it read during cranking?

How Can I tell if the ECU is on? While the ECU had a power lead, I don't find a ground lead. Is this connected directly to the pre-wired part in the engine?

Also I wired the AMP shunt for the Dynon ECU between the alternator and battery, this should show charging amps, but when I turn it on it shows -3 amps discharge. I don't think I should be able to measure discharge from that location. Is this normal or does it require calibration?

Thanks

Jonathan

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Our Grand Rapids EIS with a Hall Effect Current Sensor also reads -3 until the engine is running, then it reads the charging current.  Our sensor is located between the alternator and batteries/buss loads. 

Hopefully Jan will chime in soon on your other questions.

Thanks! That was super helpful!

where did you pick up the rpm from if you have it shown on the Dynon.

Connected RPM input on Dynon to RPM wire on Viking. Might have had a pullup / pull down resistor involved in the setup.

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