rising edge pulse?

I am trying to hook up my Astrostart 2205 to control my Check Corp heated seats.   The Astrostart can generate a negative pulse (of programmable time).  My heated seats are controlled by a membrane switch.  I am told by Check that they require a rising edge pulse to signal.  I am told this should be negative.  I tried just using the Astrostart directly and it didn't work.  I also tried a relay.  Any suggestions?

Anthony

I have been probing the wires. 

The Astro Start wires do exactly what they are supposed to.

I probed the signal wires on the membrane switch.  It seemed like the switch momentarily broke the connection.  I setup a relay to break the connection when the Astrostart gave its ground pulse.  That didn't work.

I have been working with the seat manufacturer.  They are seeming to be worthless and I am sick of driving around with no dash board or center console.  It has been a week of them "waiting to talk to the engineer".

ac

Rising edge pulse would be the transition from negative (or 0) to positive voltage.

12vdc              _____________

                    ^ that is the rising edge

I've never heard anyone use the term quite like that though.  Typically in car electronics switch on the falling edge, as most car electronics run the ground signal out to the switch, but either way works.