and made this diagram in photoshop.
RH - relay for high circuit
RL - relay for low circuit
TS - thermoswitch
It's supposed to allow the whole deal to be turned off for the freeway or water crossing (which i do all the time :moon: ).
Also, the light is supposed to turn on when the thermoswitch closes unless the high circuit is in operation.
I don't know enough about electrics to know if I got this right! please criticize!