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#1 |
Registered User
Join Date: Oct 2022
Location: Regina, Saskatchewan
Posts: 343
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Hidden Ignition Kill switch install - Best wire to put the switch on?
Hey Guys, as I invest more and more money in restoring my truck, I've been thinking that I'd like to hide a kill switch somewhere up under the dash. I would like another layer of protection incase I have to park on the street in a shady area.
I want to put a toggle on/off switch but am not sure which wire to put it inline with, any recommendations on which wire to install it on under the dash? I'm looking for the truck to be completely dead if someone tries to turn the ignition. Thanks!
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1971 Chev C10 - 250ci L6 w/3 speed on the floor Upgrades: Power Steering 3 Core Radiator 7 Hole Gauge Cluster Power Brakes (Incoming!!..) 1971 350 (Incoming!!..) |
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#2 |
Registered User
Join Date: Jun 2021
Location: Buckeye, AZ
Posts: 87
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Re: Hidden Ignition Kill switch install - Best wire to put the switch on?
I've toyed with the idea of using the cigarette lighter. Re-wire it as a switch, and when you push it in, all is good, but when it's popped out, no power.
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#3 | |
Registered User
Join Date: Dec 2017
Location: Elkhart, Texas
Posts: 1,699
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Re: Hidden Ignition Kill switch install - Best wire to put the switch on?
Quote:
If you want to "kill" the entire electrical system, you'll need to attach a very heavy duty switch in either of the main battery cables. Something like this: https://www.summitracing.com/parts/qcr-55-010 |
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#4 |
Registered User
Join Date: May 2011
Location: Northern Calif.
Posts: 3,684
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Re: Hidden Ignition Kill switch install - Best wire to put the switch on?
While I'm all for hidden kill switch's, just remember how darn easy it is to jump in and coast our trucks around the block. Without locking steering wheels and locked in park we really are vulnerable to thieves. The transit bus I drove had an interlock on it so if the back doors were left open, no way were you going to get it out of park. Would be an interesting retrofit?
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#5 | |
Registered User
Join Date: Oct 2022
Location: Regina, Saskatchewan
Posts: 343
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Re: Hidden Ignition Kill switch install - Best wire to put the switch on?
Quote:
Figured putting in a switch would be real easy to do as long as I get the right wire. My truck has a nice big cushy spot in the garage so at least she's not on the street all night ![]()
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1971 Chev C10 - 250ci L6 w/3 speed on the floor Upgrades: Power Steering 3 Core Radiator 7 Hole Gauge Cluster Power Brakes (Incoming!!..) 1971 350 (Incoming!!..) |
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#6 | |
Registered User
Join Date: Oct 2022
Location: Regina, Saskatchewan
Posts: 343
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Re: Hidden Ignition Kill switch install - Best wire to put the switch on?
Quote:
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1971 Chev C10 - 250ci L6 w/3 speed on the floor Upgrades: Power Steering 3 Core Radiator 7 Hole Gauge Cluster Power Brakes (Incoming!!..) 1971 350 (Incoming!!..) |
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#7 | |
Registered User
Join Date: Dec 2017
Location: Elkhart, Texas
Posts: 1,699
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Re: Hidden Ignition Kill switch install - Best wire to put the switch on?
Quote:
Yamariv, I can't come to your truck and lay your hands on them, but if you get on your back on the floor of your truck and look under the dash, you'll find all those wires I mentioned in my first 2 suggestions. Depending on exactly which wire and where on it's circuitous route you want the switch, you may have to remove the screws holding the fuse box in place to gain access.. But, as I said, they're all there under the dash. |
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#8 |
Registered User
Join Date: Apr 2011
Location: Fairview Park, Ohio
Posts: 1,031
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Re: Hidden Ignition Kill switch install - Best wire to put the switch on?
I installed four 3way switches under dash below steering column. In plain sight.
To lock, all switches to in middle position. First switch. Up or down horn comes on 2nd switch brings power in and out to 3rd switch 3 switch sends power to HEI 4 switch disables neutral safety. So it’s like a combination lock. Wiring close by minus HEI and simple to do. I coupled that with a basic alarm system with power lock actuators. You can also do the high beam relay trick. Super easy.
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My build page http://67-72chevytrucks.com/vboard/s...d.php?t=764662 My cabinet building site http://www.cbcabinets.com |
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#9 | |
Registered User
Join Date: Dec 2017
Location: Elkhart, Texas
Posts: 1,699
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Re: Hidden Ignition Kill switch install - Best wire to put the switch on?
Quote:
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#10 |
Senior Member
![]() Join Date: Jun 2022
Location: San Ramon,CA
Posts: 504
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Re: Hidden Ignition Kill switch install - Best wire to put the switch on?
Personally, I'd disable the coil and let the starter crank. Letting it just crank and not start doesn't tip them off that it's switched. An old truck that takes a while to fire is pretty credible.
If you could make it fire on one cylinder like the VGG plug wire swap that'd be pretty sweet, but you'd need serious copper to switch that. Sure, it's not going to keep them from rolling it onto a flatbed, but it'll baffle the bewildered. |
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#11 |
Senior Member
![]() Join Date: Mar 2015
Location: washington
Posts: 2,236
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Re: Hidden Ignition Kill switch install - Best wire to put the switch on?
I know you are considering a stock truck. I agree something is better than nothing.
I have a LS conversion and aftermarket air. The Air no longer uses the blower switch as the fan speed is on a slide. I disrupted the power to the ECM with the fan switch. Nice thing is is looks all stock. Ya, the world know knows my secret. But what the heck, someone, unknown to me, filed my taxes this year. They had to know a lot. Good news it the IRS caught it before payment was made. It was a hassle to affirm my identity, and I had to file paper taxes this year. Not as bad had the IRS not caught it. Did you know the IRS allows you to have a pin. I recommend everyone get a pin and use it. Just like a kill switch, it keeps them out. BTW, the "three on the tree" is likely a better deterrent! Cheers Last edited by Accelo; 04-27-2023 at 09:09 AM. |
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#12 |
Registered User
Join Date: Mar 2010
Location: Oregon
Posts: 189
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Re: Hidden Ignition Kill switch install - Best wire to put the switch on?
Yes, grounding the distributor coil is better than an open circuit. The easiest way to keep the old trucks running is a wire from the battery to the coil, grounding coil or tach lead will prohibit ignition spark to engine.
Fuel cut off is also a decent deterrent. Bob |
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#13 |
Registered User
Join Date: Mar 2016
Location: Central TX
Posts: 7
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Re: Hidden Ignition Kill switch install - Best wire to put the switch on?
I like RustyPile and Rust_Never_Sleeps suggestion. I recently installed a kill switch to my 71 C10. It's an easy task.
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#14 |
Registered User
Join Date: Oct 2022
Location: Regina, Saskatchewan
Posts: 343
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Re: Hidden Ignition Kill switch install - Best wire to put the switch on?
Where did you end up putting yours?
__________________
1971 Chev C10 - 250ci L6 w/3 speed on the floor Upgrades: Power Steering 3 Core Radiator 7 Hole Gauge Cluster Power Brakes (Incoming!!..) 1971 350 (Incoming!!..) |
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#15 |
Registered User
Join Date: Mar 2016
Location: Central TX
Posts: 7
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Re: Hidden Ignition Kill switch install - Best wire to put the switch on?
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#16 |
Registered User
Join Date: Jul 2019
Location: Beebe, AR
Posts: 2,459
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Re: Hidden Ignition Kill switch install - Best wire to put the switch on?
I think he means on what wire. I've been following this thread closely as I have two trips to make in June/July and having a truck still there when I get back to it is high on my list.
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1967 C10 1980 Jeep CJ5 2020 Toyota 4Runner 2024 Toyota Tundra |
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#17 |
Registered User
Join Date: Jul 2019
Location: Beebe, AR
Posts: 2,459
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Re: Hidden Ignition Kill switch install - Best wire to put the switch on?
Thank you. Although mine has the two anti-theft devices grumpy old man indicated, I plan to install some sort of back up. Since I have converted mine to HEI it may be the simple ground the tach lead.
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1967 C10 1980 Jeep CJ5 2020 Toyota 4Runner 2024 Toyota Tundra |
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#18 |
Post Whore
![]() Join Date: Feb 2016
Location: Portland Oregon
Posts: 11,114
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Re: Hidden Ignition Kill switch install - Best wire to put the switch on?
Here's some more ideas.
http://67-72chevytrucks.com/vboard/s...d.php?t=590462 http://67-72chevytrucks.com/vboard/s...d.php?t=696808 http://67-72chevytrucks.com/vboard/s...d.php?t=474293 And some these links have links also.
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. ![]() RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
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#19 |
Registered User
Join Date: Apr 2022
Location: Moorpark, CA
Posts: 756
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Re: Hidden Ignition Kill switch install - Best wire to put the switch on?
In addition to a hidden kill switch....also using a tire boot will at least slow them down. Cutting it off makes and ton of noise as does dragging the truck away.
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#20 |
Registered User
Join Date: Nov 2017
Location: Wasaga Beach Ontario Canada
Posts: 206
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Re: Hidden Ignition Kill switch install - Best wire to put the switch on?
I installed cameras outside. Really looking forward to being forced into doing another.
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#21 |
Senior Member
![]() Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
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Re: Hidden Ignition Kill switch install - Best wire to put the switch on?
Your truck is only really safe when you have the trunk monkey .
https://www.youtube.com/watch?v=_qtG82HJB2I&t=70s
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![]() 1967 Factory short bed - Old school '71 - 350 / 4bolt / 487 heads / Edelbrock C3BX Muncie M-22 4 speed / Hurst Comp plus Factory 12 bolt posi 3.73 / 255-70-15 Smoothed firewall / Factory cowl induction Power disc brakes / power steering / 3.5-5" drop |
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#22 |
Registered User
Join Date: Jan 2019
Location: St Peters, MO
Posts: 439
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Re: Hidden Ignition Kill switch install - Best wire to put the switch on?
HEI tach lead kill switch plus hood lock and battery disconnect for longer periods.
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1967 C20, 350 SBC w/Comp roller cam, 700R4 w/3.42 posi, PS, 4-wheel PDB, Old Air AC & GM Tilt column. |
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#23 |
Registered User
Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,503
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Re: Hidden Ignition Kill switch install - Best wire to put the switch on?
I wouldn't fuss with the electrical side, that can be circumnavigated too easy.
Back about 25 years ago I bought a 64 GMC from my buddy who had taken it in trade from someone else. I could fill the float bowl and it would fire right up but wouldn't pick up gas out of the tank, I went and got gas for it and fussed with it for a day or more until I decided to get under the truck and trace the fuel line from the 35 gallon stainless tank in the bed to the fuel pump. Right under the seat was a 3 way manual fuel valve like we used to use with auxillary tanks on trucks back in the 60's and early 70's before the square body trucks with dual tanks and the electric switch. It was turned to off. It's easy enough to cut the ignition wire from the switch to the coil and add some wire and a hidden but reachable switch. Trouble is that a jumper wire with a pair of alligator clips under the hood bypasses that and it is too easy to bypass the starter switch. Shut off the fuel and they aren't going to drive it away especially if let it idle and run the bowl dry or almost dry.
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Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. |
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