We too (461) are trying to use the transducer (2/25/04) and wired it originally to the Pneumatics diagram which says Red=GND +5V=BLK SIG=GRN...this proved to be wrong and after reading the diagram on the transducer, SIG=RED +5V=BLK GND=GRN...this too also proved ineffective. We then wired it RED=+5V BLK=GND GRN=SIG...same thing...HELP!
We really need this part b/c we don't have a pump...oops, we're heavy! :-P See you in Michigan!!!