Join Date: Nov 2009
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The ignition switch is the A terminal in the OEM option connector. You could run cab ignition to switch at the back to the 86 pin on the relay, and when activated break the connection to kill it. 85 terminal to ground. Power to 30 pin wire from the À`terminal cut to go to the back other end terminal 87.
That way you would start it in the cab and you can shut off in both the cab or the truck. You need a normally closed switch at the back they have them so you have to hold them to `open`the only bad thing is when killed at the back the ignition would still be on at the front, you would have to shut that switch off.
Hope that helps!
You can put a start switch at the back with power going to the start button, at the back, and other wire to the relay wire on the firewall if it is a Freightliner. You do not need a relay for the starter button as that circuit is open at the button or ignition switch.