Kill Switch

[Topzide]

Another thought would be to use a magnetic switch. That way you could lay corresponding part on top of switch which could be in console, cup holder

 

[LivLogik]

I would put a relay inline with switch. That way you can use a small switch and let the relay handle the load without issue. The smaller the switch, the easier to hide! You could opt for a momentary switch to hold on while cranking to prevent switch being left in the on position. A relay and micro switch and wire will get it done. I'd solder and heat shrink all connections to prevent issues down the road. This site has great info on relays and the such, https://www.the12volt.com/. Good luck with project!

what if i have a inline fuse where it is wired like this --->

Wire going to starter solenoid wire -- inline fuse -- wire to switch -- SWITCH -- wire from switch -- the other end of the solenoid wire

 

[LivLogik]

do you think that would work? i have a 30amp inline fuse. Amazon product ASIN B081DHT8Y7

 

[Topzide]

That would work as long as the switch is rated to handle the load going to the starter. You would always want a fuse in the circuit to prevent a short. I like the relay in circuit as always a much smaller switch since relay handles the load and not the switch ( have learned this the hard way). That site I linked might even has what you're trying to do; https://www.the12volt.com/relays/starter-interrupt-diagrams.asp.

 

[LivLogik]

so the switch i have is rated 12V 25A do you think that would be fine? im not sure what the starters load is

 

[LivLogik]

That would work as long as the switch is rated to handle the load going to the starter. You would always want a fuse in the circuit to prevent a short. I like the relay in circuit as always a much smaller switch since relay handles the load and not the switch ( have learned this the hard way). That site I linked might even has what you're trying to do; https://www.the12volt.com/relays/starter-interrupt-diagrams.asp.

also thank you for the site it has a lot of info!

 

[LivLogik]

my worry is doing something that is going to mess up or cause a fire lol that would not be good. so this is the layout i think im going to use if the switch can handle the load of the starter.

Wire going to starter solenoid wire -- inline fuse (30amp) -- wire to switch -- SWITCH (rated 12V 25A) -- wire from switch -- the other end of the solenoid wire

 

[LivLogik]

does anyone have a picture of what wire to tap into? like which wire is the starter solenoid?

 

[Topzide]

It's going to be a small gauge wire on the starter solenoid which should be attached to the starter. Easiest way if to disconnect it. wrap with tape and try to start the truck. Follow that wire back away from the start to not draw attention to what you've done. some of these guys are pretty smart and look for those things. I would also wire in a hood pin to a horn so that when they try to start and then open hood, surprise! Glad that site has offered you some insight and glad to help! Can always learn a new trick. Trucks are too expensive to replace!

 

[BigPapa]

A relay shouldn't be necessary, the circuit only uses a 5A fuse. I was referring to the S123 Splice. It will be a Yellow 20 gauge wire with a Dark Blue tracer in the main harness. It runs from pin #2 of the C1 Connector and Pin #21 of the C10 Connector at the TIPM to pin #21 of the C3 Connector of the PCM.

 

[verk]

I would put a momentary switch somewhere inside the cab the makes/breaks what's labeled as T751 ( yellow ) for my '04. This is the wire from ignition switch that energizes the coil of starter relay. I've unplugged this relay when concerned about my truck being stolen so you would accomplish the same thing. I have a momentary switch on the clutch safety switch of my manual as this seemed easier than finding T751, but it shouldn't be too hard as it's position is well identified in big connector (C219) by pedals. Then you don't have get into the engine bay and being that this wire is only energized when switch turned to start you also have some recourse for short although I would use jacketed wire from where you tap to your switch.

 

[Alcan]

I put in a Kussmaul Safety Lock D in my '04 5.9 3500 w/ manual trans. As Kussmaul states "The simple pressing of a button, and removal of the key, is all that is required. Upon the operator's return, the insertion of the key into the ignition lock returns the system to normal operation." I've been using it for many years now without fail.

 

[verk]

I put in a Kussmaul Safety Lock D in my '04 5.9 3500 w/ manual trans. As Kussmaul states "The simple pressing of a button, and removal of the key, is all that is required. Upon the operator's return, the insertion of the key into the ignition lock returns the system to normal operation." I've been using it for many years now without fail.

Interesting device that I didn't know existed. Since the only signal from a manual transmission is the clutch safety switch I wonder if you could defeat the security feature by disconnecting the connector at the safety switch. If this device provides security in addition to allowing your engine to run without the key then I missed that in description.