[RoninLB]

I don't know anything about '89 specifically or your alarm system.

there is a jump at the alarm box to bypass it. It's in the archives somewhere or start a new subject.

otherwise if that car was given to me without any info I'd start at the ignition switch with a test light and a wiring diagram.

it may be a simple as the main feed to the switch. The battery positive connector may have a seperate wire along with the large starter cable. My car has 2 small factory wires along with the starter cable. Other pelicanheads have reported that interference can happen if the wire corrodes under the wire insulation. It's a 911 trait.

also you have to hook up the 3 plugs under the dash. I use a razor blade to widen the indivudal pins so there is a good connection. One of those plugs feeds the ignition switch with power if i remember correctly.