Fit a tap in the fuel line some distance away from the engine which is asseable from the inside.
The truck will start, it will make it 100M down the road and then konk out and not re-start.
IMO if your trucks on the driveway the theif has all the time in the world to bypass anything electrical to start your truck. If they have broken down in the middle of the road they are going to leg it.
Oh if you wire a set of airhorns to the alternator feed wire through some kinda switch (not sure totally how to do this, since you don't want it going off when you try and start the truck) but as soon as the engine stalls / runs out of fuel all hell will brake loose. Broken down truck blocking the road with 120Db of dixie horns going :lol: watch that scallie run :D
Oh I used to have a set of air horns wired up from a discreat rocker switch to the fuel stop soliniod. Turn the ignition and rather than the stop soliniod releasing, again, air horns got set off. OK they can pop the bonnet and pull the horns, but they have to trace back the standard looking wiring to get power to the stop soliniod.
Don't try and make the car unstealable, that won't work, try to make it inconvinient and embarrising for a potential theif. You should me anyone you'll stand there with headlight's flashing, horns going off and an engine which has just konked out and won't restart. That amount of noise should also wake the owner so they can go out and close the doors before some other kid things it funny to have the radio.
Oh descreat places for switches are not in the glove box, under the side of the drivers seat base, or withing arms reach on the bottom of the dash.
