Theft proofing a m939

[jcollings]

Any body have a good easy way to prevent people from steeling your truck?

 

[603hellmutt]

Locking door handles, battery cutoff switch, keyed ignition switch, I also put a chain around my steering wheel but some people aren't a fan of that. All of those make the truck pretty much inoperable. Could also open your emergency gladhand so it won't be build air.
Best of luck

 

[wsucougarx]

An easy fix until you get things completed (although not 100%) is to remove the switch levers.

 

[infidel got me]

D

 

[gimpyrobb]

If someone wants something, yor not going to stop them.

That being said a fuel shutoff and a battery kill switch will be your best bet.

 

[Swamp Donkey]

Take the tires off and put them in the bed. Nobody likes messing with them heavy things. The couple of people I've asked to help just turned around and RUNNOFT...

Seriously though, just remove the label on the dash for the battery and start switches. Unless they know these trucks, the switches just look like the rest. If they do know these trucks, you didn't have a chance anyways.

Think about it like this:

No PCB = no start
No fuel = no start
No air pressure = no go

There's a couple of low amperage wires going to the PCB, where a simple toggle switch could be put in line to keep the solenoids from engaging.

The fuel shut-off solenoid is operated by a single low amperage wire. A simple toggle switch in line would do the trick.

A simple toggle switch in line with the neutral safety switch will work too.

Leave the tank drain valves open. The brakes can't be released without air pressure and you can't hear the air blowing if they're all open. The tanks are supposed to be drained daily anyways, right?

Leave the truck in reverse and transfer case in neutral. No start and no go. They'll have to figure that out, along with the battery and start switches, and the drain valves.

There are many things on the M939 trucks that can be done without modification, to create a no start situation, that would leave even the seasoned owners scratching their heads.

I spent a couple of hours one night trying to figure out why my truck wouldn't start after replacing some gauges. I thought a wire had come loose behind the dash. Turned out I had bumped the shifter into 1-5. Was the last thing I thought to check.

There isn't really anything in the cab I can't do without. I have the locking door handles but don't use them. I'd rather somebody just open the door then break things trying to get in.

Don't over think it. Simple will do just fine.

 

[simp5782]

I replace the metal line from the tank to the fuel filter housing on all my trucks I turn over for people. since the truck may be sitting some where for awhile or what not unattended. I replace It with the push lok fittings on the tank and filter housing. I then install a 1/2" manual shut off valve in the middle of the line somewhere Typically behind the air cleaner so you kno where it is. Worse case scenario just close the valve and take the valve handle off.

 

[BenRoberts]

A looping tape recorder of a nagging mother in law sitting on the seat should do the trick

 

[74M35A2]

Wire an HEI ignition coil to the start switch. That'll teach em'...

 

[BenRoberts]

Wire an HEI ignition coil to the start switch. That'll teach em'...

Id end up finding out myself more than once

 

[simp5782]

We already have an electric fence accident post. Don't need anymore electrical experiences

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