alright you guys, i just did a system on a buddys car. this is what i did to do a push button. I purchased an Ignited Push button, DEI 556T Timer unit.
The dei allows a timer of 25 seconds after he has swiped a magnit over the sensor places somewhere inside his car. The magnetic field allows the timer to trigger for 25 seconds. Within 25 seconds the car can be started.

as metioned before wire push button, ground to button, button to relay make sure when button pushed, ground is present

Relay terminal 85 - output trigger from the timer.
Relay terminal 86 to push button (shows ground when pushed)
Relay terminal 87 to Constant 12volts Fused with 30 amps.
Relay terminal 30 to start wire, Motor side.

timer unit setup
constant 12
ground
timer trigger wire with pulse (by magnetic key card or magnet)
Normally closed to Push button
Trigger/ status out to bypass module and to the relay.



sounds confusing but its easy to do. a little reading takes u along way.