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Old 09-29-2022, 11:55 AM   #21
Skoolie
 
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Year: 2005
Coachwork: Thomas
Chassis: Freightliner
Engine: Cat C7
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RE: I've only got four wires coming out the back of my ignition switch.



So do I on my Thomas. The 4 wires are like in my picture ^^^
1. Batt-12v which is the incoming hot wire
2. ST - start solenoid
3. ACC
4. IGN
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Old 09-29-2022, 12:01 PM   #22
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Year: 2008
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Chassis: CE300
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I assume the IGN pin is the "pre-ignition" key position, just before turning it over with that ST pin going hot? (As opposed to ACC, which is the non-warming accessory mode)
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Old 09-29-2022, 12:05 PM   #23
Skoolie
 
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No idea, maybe someone else can answer that one.
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Old 09-30-2022, 04:38 PM   #24
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Here's the finished product. The 5 1/2 inch reclaimed baseboard wood trim helped remove the plastic flexing which was annoying every-time I pulled the air brake knob. I used large screws to trill into the plastic to bind it all together. Flex is gone, everything feels solid. This adds a touch of class to the drivers area w wood trim, and looks nice, I think. Total price, zero $. Thank you all for helping out with the wiring!
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Old 10-01-2022, 05:11 PM   #25
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Quote:
Originally Posted by Peterjk View Post
Hey everyone,
I'm looking to eliminate my 2005 Thomas standard key ignition and replace it w this push button ignition.
The Thmas key is nearly flat, so that would not prevent anyone from stealing the bus anyway, and I have other ways to prevent bus theft anyway.

Has anyone done this?
I dont know if the enclosed relay is needed, Im guessing the ignition already has one?
In theory, when I flip the Red switch On, that would like placing the ignition into Acc more, then just hit the button to engage the started .



Any help would be appreciated.
Your keyed ignition switch serves more than one purpose. It turns on and off accessories as well as the ignition system. It also energizes the glow plugs and last but not least the starter. As long as your replacement switch system covers these bases and is suitably sized, it will work.
You could even design some security into the system if you like.
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Old 10-01-2022, 06:07 PM   #26
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Join Date: Mar 2022
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Year: 2008
Chassis: IC RE (PB30500)
Engine: Maxxforce DT
I did a push button on a 84' F-150 a couple years back.
Purchased a start button w/ switch panel. The panel had switches for ignition and accessory. Moved all the wiring from the original ignition switch to the start button switch panel, except for the main 12v wire.
I purchased a "brass ignition switch" from autozone, about $12. It was over by the relays and came with a couple keys. I mounted the ignition switch hidden up under the dash. I took the main 12v off of the original ignition and attached it to the 12v terminal on the new hidden switch. Then had a wire going from the ignition terminal on the hidden switch going to the 12v power terminal on the start button w/ switch panel.
That way with the key inserted in the hidden ignition switch, in the running position, the start button and switch panel had power. Turn the hidden ignition switch to the off position and remove the key, and the start button and switch panel did not have power.
If it was parked at my house or somewhere I trusted like work I'd leave that hidden key in. But if I went somewhere I didn't trust, like an unfamiliar town I'd take the hidden key out and then the truck wouldn't start.
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Old 10-01-2022, 09:16 PM   #27
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My security system is to simply lock the rear window, which disables the ignition.
That feature came with the bus.
Funny story, when i first got my bus delivered, i didn't know about the door and window locks also disable the ignition. First night i locked the side doors and back window. Several days later i tried starting the bus. Of course nothing happened . In a panic, i tried to retrace my steps trying to figure out what i may have done to have caused this. I googled this forum, and discovered the built in feature.
But your general thief that might gain access into the bus probably wont figure out to open the back window latch first.
Having said that, I'm still going to drop in a hidden kill switch somewhere in addition.
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Old 10-01-2022, 10:28 PM   #28
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That dashboard looks nice, too nice, now you're going have to do the rest of it xD
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