Quote:
Originally Posted by Phil
I was testing for a project I am working on and found that when I lock the doors I get 12 VDC on the lock wire that stays there until I unlock the doors. When I turn the key to unlock the doors it sends a momentary signal to the pump and then goes away. It seems like it should be a momentary pulse and not stay on in the lock mode so it would act like the unlock mode but does any one know for sure about this? __________________
|
The switch in the door is hot at all times. One of the two wires (either lock or unlock) from the switch to the pump is hot at all times. When the switch is moved to a "new" position, the circuit to the motor is completed. Then the pressure sequence switch breaks the circuit by flip-flopping a switch between the door switch and the motor. The motor circuit is then broken until the door switch is moved to the opposite position.