I had a clifford alarm, IntelliGuard 900-IQ that is about 16 years old. The remotes stopped working about 8 years ago. Clifford no longer publishes the wiring diagrams for these alarms. One of my relays went bad in my alarm. According to the relay specs, the relays are rated for so many on-off switches before they fail, each relay is $24, and would have to be re-soldered to the PCB. This caused a loud clicking noise when driving and all lights to flicker. I could not just remove the main head unit on the alarm because it was wired with a starter kill. I needed to bypass (remove/get rid of) the alarm but without a wiring diagram it is very difficult. I found a wiring diagram for an Intelliguard 800-IQ. Turns out the wiring is the same.
Disconnect the battery. Instead of splicing back the cut wire in the diagram. As seen in the diagram, if shorting pins 30 and 87A of your harness it bypasses the starter kill. Then removing the unit from the harness and your car goes back to normal. I used a small piece of solid gauge wire (from romex) flattened the ends and shorted the relay harness as shown in the picture. Hopefully this helps the next person who has the same alarm. Remember to reconnect your battery.
Alarm head unit
Bypassing the relay
The relay removed.