Can I install a kill switch on my truck?

Brian VT, I think I'd make a terrible thief, but your explanation sounds easy enough if I get the meaning, when you say


"There is a wire that goes to the injection pump. There is a valve there that is closed when it does not have power. It prevents fuel from going to the injection pump (probably to prevent fuel spills in the event of an accident or other failure?). It opens when you turn the key on.
It seems you could just wire a switch inline this wire to control if the shutoff valve is open or closed even when power is being sent to it. Just like a light switch in your house."

Then run a wire that interrupts the power back to a button or switch in the cab that only comes on and starts when I push it to connect the power back to the IP

I will look this up just so I don't mess up and wish I hadn't, but thanks guys, to all of you

Old-Red said:

Then run a wire that interrupts the power back to a button or switch in the cab that only comes on and starts when I push it to connect the power back to the IP

Click to expand...

Just to be clear, the switch would need to be a type that stays on (run) or off.

So after looking just a little, I've found a description on this site that reads as follows; https://www.oilburners.net/threads/84-6-9l-idi-wiring-info-help.64490/ "

"The red/green is key-onpower. #14 should be big enough for all the original loads on this wire, Ford probably used a #16. Anything that was hooked to the red/green is on the same circuit. If it's a different circuit, it will be a different color wire.

The red/green was the supply for the injection pump, and it came directly from the ignition switch through a fusible link, no fuse on this wire."

I'm thinking I would connect to the red/green wire out from ignition, under/behind dash, with short run of 14GA and a fuse, directly to button/switch, then reconnect to wire I interrupted, running to Injection Pump. I don't know what size of fuse yet, but am I thinking straight?

Before getting a response, I'm diving back in, to add what I read on another site, which I wasn't aware of. Seems there are 3 connection points on the Injection Pump, which isn't an attempt to add a Kill switch, but this is something I hadn't heard yet;

"There are 3 spades connections and you can only mix up 2 of them. The one for the fast idle solenoid is the longest (very easy to figure out) and if you were to place this on the pump instead, the others would not reach.

The other 2 are even easier to figure out. The single wire goes to the rear most spade on the inj pump, and the double wire spade goes on the front most spade on the injection pump.

So to summerize:

1.) Longest goes to fast idle solenoid.
2.) Single wire goes to timing advance (rear spade).
3.) Double wire goes to FSS (front spade)."

So my question is, if the double wire connects to the injection pump from front spade, and the colors are red and green, will I be connecting kill switch to the red wire? And what is the green wire for?