Isolating engine startup

Submitted: Saturday, Mar 12, 2005 at 20:52
ThreadID: 21173 Views:1422 Replies:4 FollowUps:0
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I know you shouldn't do this, but we leave the keys in our Toyota's and Rodeo all the time. We live a number of kilometres from any town. It's convenient to jump in any of the vehicles and do the necessary farm work without chasing up keys etc. All the vehicles are diesels. The other day we think there may have been diesel taken from one of the Toyota T/D Utes. The next thing we know, we will have one of the vehicles stolen and the Insurance Company will have every excuse not to pay up. I know it's easy to install an Isolating Cut Out Switch in a petrol motor but what is the best way for installing a "Cut-Out or Isolating" switch to a diesel motor.
I would be interested to hear some positive reponses.
With thanks.
Bill
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Reply By: Richard Kovac - Saturday, Mar 12, 2005 at 21:01

Saturday, Mar 12, 2005 at 21:01
If the engine turns off by the key and not a stop cable
Just fit a switch between the key a the fuel shut of solenoid place it up under the dash out of the way, and turn it off when you leave the truck
that way the engine will turn over but will not start

Regards

Richard
AnswerID: 102193

Reply By: mitch - Saturday, Mar 12, 2005 at 21:17

Saturday, Mar 12, 2005 at 21:17
What l did was to cut the wire at the ignition swich that engauges the starter and run it across to a rear demister switch ( mine is a 60 with barn doors and no demister on the rear windows ) so with the switch in the of position the key turns to start and nothing happens , lights but no action .

Turn the demister switch on and the starter can work . no matter diesel or petrol .

Of course the car can be roll started as it still glows or short the starter.

Regards Mitch
AnswerID: 102195

Reply By: Dion - Sunday, Mar 13, 2005 at 12:15

Sunday, Mar 13, 2005 at 12:15
Both replies so far are good ones, however use both methods, but with one switch. The one switch, however needs to be double pole, single throw (dpst) or double pole, double throw (dpdt). One pole has the starter motor circuit in it and the other pole has the circuit for the fuel pump cut out solenoid.
With this double pole switch in the open position, the engine can't be cranked from the key, nor can the fuel pump solenoid be energised, so even if the crooks got cunning an attempted a roll start or physically short the starter motor, the engine still won't fire.

Cheers,

Dion.
AnswerID: 102219

Reply By: Member - Grazierbill - Monday, Mar 14, 2005 at 21:51

Monday, Mar 14, 2005 at 21:51
Richard, Mitch & Dion
Thanks for your reply. You have given me some interesting thoughts. Next time I get to town i'll discuss it with an Auto Elect. I want to ensure i don't "stuff up" the computer boxes on any of the vehicles.
The idea of immobilising the engine also has a lot of merit when we go into town or go away for a short break.
Thanks once again.
Bill.
AnswerID: 102432

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