[California98Civic]

I cut the ground for my PGM-FI relay and that also shuts down the fuel pump. I have been driving like this for almost a year, heavily using the switch. No fuel pump issues. Fuel pressure remains fine, because pressure just does not leak from the line in seconds (barring a leak). CAUTIONS: I am also not an electrician, and therefore want to warn you not to rely just on this FI wiring diagram when deciding where to cut a wire. Consult other wiring diagrams too. When I was installing my alt kill switch, the alt wiring diagram showed me what seemed a good place to cut, but it was not revealing that where I planned to cut would also disable an O2 sensor. Do this slowly, and do your mod reversibly first, so you can test effects of changes and avoid troubles. Lastly, the advantage of cutting the ground to the PGM-FI is that there will be no live power running through your switch. I get a nice clean cutoff too. I hope that info is helpful.