I have a firetruck that runs great but it doesn't cut off properly after I worked on it this morning.

I now have a problem as the firetruck doesn't shut off when you turn the key off(Note: It used to..:-). This just started today as I installed(tried) to install the two speed rear axle speedometer adapter behind the dash.

So I guess my question is: what could I have done to stop the switch from working and cutting off the truck like it used too? The wires on the ignition switch look fine...but?

Any thoughts from the electrical experts?