PSIG wrote: ↑Wed Feb 19, 2020 2:21 am Not to worry, as this is an output with little chance of burning something when using the GM 4-pin as a coil driver. That said and for giggles, connect B+ to B, and ground to the mounting hole. Nothing else connected. Put a meter set for continuity from C to ground. It should read no continuity. Apply 5V (from the Speeduino 5V pin or a board 5V source) to G. Terminal C should now show continuity. Don't forget in all of this, that the ground for the module and for Speeduino must be shared (same source or grounds connected).David, I attempted what you suggested... unfortunately, I don't think I got the expected.
Likewise, you can connect it all as it will be in the vehicle (except coil), and use the Hardware Test mode in TunerStudio. Again test terminal C for state change when the signal is sent by Speeduino.
David
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