F-150 Starts but will not shut off?

I have a 1998 f150. Today everything was fine then it won't start. There was a box that connected to my ignition that was there before I purchased it. I removed this box and my truck crank right up. But it won't shut off. The box was only hooked to two wires. A red wire and a red with blue strip. I splice them back where they go. My dash lights also stay on. What is going on.....Please help????

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