MSD theft wiring?
Thread Starter
Melting Slicks
Joined: May 2012
Posts: 2,192
Likes: 343
From: Allenton Wisconsin
MSD theft wiring?
Can someone point me towards the post that explains the MSD ignition theft protection. Doing a 6AL install and some other wiring upgrades while the engine is out. Thanks T
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
I believe its just the extra white wire from the box to ground. U just install a switch in the wire and attach that to ground. The switch - where ever u install it - becomes a kill switch. I would use a switch with a tamper cover and install out of sight but with access from the drivers seat.
Thats what i recall w/o looking up the drawing.
Thats what i recall w/o looking up the drawing.
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,753
From: Charlotte NC
The WHITE wire is the ignition KILL circuit. CRANK your engine and GROUND the WHITE WIRE and the engine will DIE.....THUS...IF this white wire is grounded...the engine will spin over but not fire up...do to NO IGNITION.
How, or where you do this is up to you. I have my way of doing it. And it is s good circuit to have...and it is not just for theft.
Best of luck to you.
DUB
How, or where you do this is up to you. I have my way of doing it. And it is s good circuit to have...and it is not just for theft.
Best of luck to you.
DUB
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
Reminds me of a '70 GTO/Lemans convertible with FI on it, years ago....
car had several interlocks, all wired into relays behind the driver kick panel....the logic was.....turn on the key, hit hidden button one, then button two, then to hit the switch to start....trick was...the interior lights had to be ON or it was no go.....and the button sequence had to be correct or no go.....
STEAL THAT!!!! bitch......You may hook it, but you not driving it.....not for a week, anyway.....
car had several interlocks, all wired into relays behind the driver kick panel....the logic was.....turn on the key, hit hidden button one, then button two, then to hit the switch to start....trick was...the interior lights had to be ON or it was no go.....and the button sequence had to be correct or no go.....
STEAL THAT!!!! bitch......You may hook it, but you not driving it.....not for a week, anyway.....
Instructor
Joined: Mar 2013
Posts: 205
Likes: 20
It works well !!!
The WHITE wire is the ignition KILL circuit. CRANK your engine and GROUND the WHITE WIRE and the engine will DIE.....THUS...IF this white wire is grounded...the engine will spin over but not fire up...do to NO IGNITION.
How, or where you do this is up to you. I have my way of doing it. And it is s good circuit to have...and it is not just for theft.
Best of luck to you.
DUB
How, or where you do this is up to you. I have my way of doing it. And it is s good circuit to have...and it is not just for theft.
Best of luck to you.
DUB
DUB installed mine, and it works flawlessly. If I have to kill the engine in an emergency I can shut down the engine in half a heartbeat! It also gives that extra comfort that no one can steal my Vette (easily).
Le Mans Master
Joined: May 2006
Posts: 9,993
Likes: 1,136
From: League City Tx
You can also just put a toggle switch on your 12v switched power wire to the MSD box.
For example my MSD box 12v is ran to an Accessory port on the fuse box. So I just broke the wire, added a hidden toggle switch and that's it.. Flip the switch and no power to the MSD box, and it can't start.
Very easy.
For example my MSD box 12v is ran to an Accessory port on the fuse box. So I just broke the wire, added a hidden toggle switch and that's it.. Flip the switch and no power to the MSD box, and it can't start.
Very easy.
Drifting
Joined: Jan 2012
Posts: 1,908
Likes: 129
From: Fredericksburg Virginia
I've gone a step further and added a wireless switch to mine along with a Bosch relay.
I now have a key-fob with an "On" and "Off" switch. When Off, the white wire is grounded. When On, the white wire is not grounded. It ends up being an On-Off switch for my car.
The main reason for the Bosch relay is because these systems only switch the POWERED (12V) side of the circuit and not the GROUND side. Even with the unit off, activated, or whatever, the ground is always grounded and not switched. The Bosch relay allows me to switch the ground.
It also allows me to have it default to a grounded condition. Remove the battery and the system is still grounded. Unless there is power and I have toggled it On.
The moral to this story? Guard your white wire.
I now have a key-fob with an "On" and "Off" switch. When Off, the white wire is grounded. When On, the white wire is not grounded. It ends up being an On-Off switch for my car.
The main reason for the Bosch relay is because these systems only switch the POWERED (12V) side of the circuit and not the GROUND side. Even with the unit off, activated, or whatever, the ground is always grounded and not switched. The Bosch relay allows me to switch the ground.
It also allows me to have it default to a grounded condition. Remove the battery and the system is still grounded. Unless there is power and I have toggled it On.
The moral to this story? Guard your white wire.
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Race Director
Joined: Apr 2009
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From: Charlotte NC
Melting Slicks
Joined: Feb 2006
Posts: 3,105
Likes: 96
From: Sunrise FL
The benefit of having a GROUNDED circuit is its harder to find if you are the crook.
Its much easier to trace a lack of voltage and jump the open circuit to a 12v source!!
Another use of the white wire might be to stop the engine (kill an electric fuel pump) if no oil pressure or accident.
Its much easier to trace a lack of voltage and jump the open circuit to a 12v source!!
Another use of the white wire might be to stop the engine (kill an electric fuel pump) if no oil pressure or accident.
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,753
From: Charlotte NC
I forget that SOMETIMES the simplest way answer is the OBVIOUS
DUB