I have an ungo remote start/alarm. This AM the car would not start and the alarm went haywire- kept going off, took control of the car, A/C going on and off, etc. Had to disconnect the battery to get it to stop....

SOURCE: Clarion ungo alarm model 5100

Can't seem to locate a manual. Just get into the wiring under the dash and follow the larger wires from the alarm brain and cut each wire, one at a time, from the factory ignition harness them tape. Start with just the starter wire to see if that fixes the issue for now. If this problem just started, check to see if there is a tach wire that runs under the hood to a coil or injector. If this wire is disconnected the remote start won't see the car is started and will continue to crank the starter.