Cross-posted from MSII Forum
I need to modify the fuel pump drive on a V3.0 board to provide +12V on pin 37 (DB37) in lieu of the ground of the standard circuit.
This will be used to energize my fuel pump relay.
This will permit me to use my car's existing wiring without modification.
I have put together a circuit which I think should work and would really appreciate confirmation from someone who knows more about electronics than I do.
Circuit design assistance ?
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