Horn as line lock switch

Im trying to use the horn to activate and deactivate a line lock with a master switch to turn line lock on. I have it wired using the starter kill with horn diagram. But I haven't gotten either horn or line lock to work. Is there a better way of wiring this or am I way off using the stater kill. . Any help. Thanks. . . A line lock is a solenoid that when activated locks the front brakes so you can burn the back tires without holding brake pedal.

Took me a few days to think of a solution. I like simplicity. How about a Double Pole, Double Throw (no center off) switch? Wire one pole as your power for the line-lock. (the terminal opposite the OFF position will be blank). Wire the other pole center to the horn button, the pole opposite OFF to the horn or its relay, and the pole opposite ON to the line lock's control.