door locks are negative through a 1500 ohm resistor.
the wire is white in the big black plug in the kick.
bulldog might have a strong enough negative signal to make em work .. so you may need to wire in a couple relays.
and as for a bulldog.. i wouldnt even waste my time throwing it in the garbage.. i hate that junk
i knew a guy once that pressed his starter button on the fob and his truck went up in flames
