Air shifter wiring problems

Travis England

I have an air shifter (bimbra) with an NLR rc-1 two step... Everything used to work fine but then the pump went out a few months later I put a new pump on and now it doesn't shift...the two step works okay kills rpm at 5k and when I hit the shift/ horn button the spark is killed but no shift. I can reach down and hit the button on the solenoid and it will shift fine but not if I use the horn button ... Any thoughts? Note I have a yellow wire with no stripes on it some one has put a connector on it and I don't know where it goes to it's a hot wire but the shifter has it's own hot wire going directly to the battery and the other wire coming from the solenoid goes to the shift box