I have a 96 and I'm looking to install a kill switch that's hooked to the fuel pump's power wire. Was just wondering what the best place to tap this would be? I'm guessing there's somewhere close to the dash that I can nab this thing but not sure where to get that specific wiring diagram.

Any insight on a kill switch in general would be great as well!

 

I think it would HAVE TO go either before or after the relay - not sure which tho'...

 

Why do you want to install one? Could you just disconnect the battery or do you have a specific reason to kill the fuel pump? Just curios.

 

I've been asking same question to myself But then I remembered, that in Poland they used to do that as an additional theft protection. Once You switch to ignition the fuel pump remains disengaged. Then You're about to hit a hidden button that triggers a relay. The relay will power up itself (to keep engaged when the button is released) and a fuel pump. That would be my guess.

 

This was pretty common when I was living in France as well.


You should be able to disrupt the power supply for the fuel pump from the fuse panel. I don't remember off the top of my head which fuse it is, but you can find it there.

 

I live in a pretty sketchy neighborhood in the worst crime ridden city in the state lol my cars been broken into a few times in the months I've lived here and would rather it end at that lol can't afford for it to be stolen

 

that makes sense.

 

Dunno of what possibilities You have, but I'd look for an insurance. By kill switch You can't prevent getting any further damage, and the repair costs are still on You. If You owe an eye-catching, expensive car, the kill switch could be overridden by eager thefts with a platform truck and a winch.

Connecting after fuel pump relay is safer for the electronic control unit, cause it can't be damaged by a short-circuit in additional wiring[1]. On the other side, coil of relay consumes much less power than a pump itself, so the wires can be thinner (even 24AWG will do the job); Basically i'd:
- find a fuse for the fuel pump, check the fuse rating
- lookup the AWG table (i.e. here https://www.engineeringtoolbox.com/w...ges-d_419.html )
and consider what would be the best option.

[1] Maybe the ECU unit is equipped with a protection circuits, so it won't get damaged anyway. Didn't check that yet.