Anti-theft
Post Fiend
Joined: Feb 2008
Posts: 5,831
Likes: 121
From: St Albert, Alberta
Another silly question, but... is there any possibility of damage to the motor/electronics if it was continually started this way (ICM CUT)?
I can't really think of any, but I'm curious to know opinions on this. If so, why wouldn't people cut the ignition at the ICM box instead of at the coil? The coil is always the most obvious place for people to cut the power and usually the first place a theft would look because its so common to do so with a kill switch.
I can't really think of any, but I'm curious to know opinions on this. If so, why wouldn't people cut the ignition at the ICM box instead of at the coil? The coil is always the most obvious place for people to cut the power and usually the first place a theft would look because its so common to do so with a kill switch.
No there is no chance of damage. It is exactly the same as turning off the key. People do nut cut ICM power just through a lack of understanding. Back in the day when these truck were new would be thieves would carry another ignition cylinder and key as it took about 2 seconds to get in to the truck with a master cylinder lid clamp and a couple more to unplug the ignition cylinder and plug theirs in. A skilled individual could have the truck gone as fast as the owner could with the key.
The other thing that can be done to thwart would be thieves is to pad lock the hood. With the ICM power cut and a lock on the hood there is really no way to take the truck in a reasonable amount of time.
Logistics Pro
Joined: May 2010
Posts: 4,436
Likes: 19
From: Regina, Saskatchewan
No there is no chance of damage. It is exactly the same as turning off the key. People do nut cut ICM power just through a lack of understanding. Back in the day when these truck were new would be thieves would carry another ignition cylinder and key as it took about 2 seconds to get in to the truck with a master cylinder lid clamp and a couple more to unplug the ignition cylinder and plug theirs in. A skilled individual could have the truck gone as fast as the owner could with the key.
The other thing that can be done to thwart would be thieves is to pad lock the hood. With the ICM power cut and a lock on the hood there is really no way to take the truck in a reasonable amount of time.
The other thing that can be done to thwart would be thieves is to pad lock the hood. With the ICM power cut and a lock on the hood there is really no way to take the truck in a reasonable amount of time.
Now just to figure out a good way to lock the hood...
More Turbo
Joined: Aug 2017
Posts: 604
Likes: 154
From: NJ
How It Works - Z-Lok HoodLock
Logistics Pro
Joined: May 2010
Posts: 4,436
Likes: 19
From: Regina, Saskatchewan
I had run across this a while back when I was looking for a cable release hood latch. I just don't like drilling holes all over the place.
How It Works - Z-Lok HoodLock
How It Works - Z-Lok HoodLock
If you could swap out the Z-lok cylinder for something else, then we're talkin.
Post Fiend
Joined: Feb 2008
Posts: 5,831
Likes: 121
From: St Albert, Alberta
I had run across this a while back when I was looking for a cable release hood latch. I just don't like drilling holes all over the place.
How It Works - Z-Lok HoodLock
How It Works - Z-Lok HoodLock
Post Fiend
Joined: Feb 2008
Posts: 5,831
Likes: 121
From: St Albert, Alberta
What has been added is in red.
IIRC the wire you want to splice in to is the red/green (if I'm wrong I'm sure someone will correct me) splice the switch in after the ballast resistor wire splices out (shown in red) that way their will still be power to the coil if you do it before the ballast resistor splices out they can run a "hot wire" from the battery positive to the coil and power up the ICM also.
Use A single pole toggle switch, this can be hid any where under the lip of the dash, Ideally you want it in a easy to reach spot but out of sight. I have seen them done under the front edge of the seat even.
With the switch off the ICM will fire the plugs as long as the starter is engaged this will give the impression of the engine starting as soon as the starter is released the power to the ICM is cut and the engine stalls.
this gives the impression of a mech issue and after a few attempts they will give up.
See below wiring diagram and pic of an appropriate toggle switch.
Mountain Pass
Joined: Jul 2000
Posts: 189
Likes: 12
From: Minnesota
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