OK, I think I screwed up somehow....
I built the circuit in post #22,,, but it behaves exactly opposite of the way I wanted it to work.
I made it self-contained, running from a 9v battery, with a magnet mounted on the stem at the base of the turn signal arm.
2 reed relays are at the top and bottom of the left and right hand throw of the signal arm, activated when the arm reaches the top or bottom of its throw.
When either of the reed switches are activated, the alarm turns off
but when they are not actuated, the alarm beeps after a delay.
What have I done wrong now???
Man...do I feel like a clunkhead!
heeeeellllllppppp!