I have a Falcon Predator Evo 4 car alarm fitted to my car and its all cocked up. I fitted my HKS turbo timer today and from my tests, the turbo timer would count down but the alarm wasn't able to turn on untill it had finished. That was okay, can live with that untill I decide to wire it so they work properly together.

Get to the petrol station, the TT starts counting down, I switch it off manually, close the door and the alarm goes ape sh1t.

Now here is the weird thing, I can't turn the alarm off. The indicators aren't flashing like they should, but the siren is going and the immobiliser is working. I press the key fob, to arm and the button to disarm and the indicators flash, and the doors lock and unlock, as if its all working perfectly but the alarm is still going.

When i'm inside the car, with the door closed, I can arm the alarm (even though the siren is going anyway). I can then open the door inside, which makes the alarm go off properly (the pager beeps, the indicators flash). I then do the top secret thingy to put it into valet mode/emergancy override and the alarm beeps, and the indicators go off (as it would normally), but the siren and immobilser keep going.

The turbo timer is 100% what caused it to mess up. The alarm and the TT both share the same handbrake earth and the same RPM sensor wire. I connected an ignition live today to the stereo aswell (this is used by the turbo timer function on the alarm).

The alarm is designed, so that when you turn the ignition off, the doors unlock but the engine still runs and when you close the door, the engine then cuts off. When I fitted the HKS timer, i've noticed that there is a quick blip in the ignition as it switches from the key to the TT. There was then another quick blip (as I turned the TT off manually) where it switched to the alarm, could this be what upset the alarm?

These are the wires I connected yesterday on the alarm, coming from 1 plug called C4.

RPM - which should be connected to the Neg side of the coil (i've connected this to the RPM wire on the ECU.)

Ignition 2 (see remark #5) - "If the vechicle has ignition 2 (ACC 2), this wire must be connected to ignition 2 (Acc 2) of the vehicle via a relay - see page 6". We don't have ignition 2 so I connected it straight to the radio's ignition live.

Alternator - I was told on a car alarm forum that this wire would be for the alarm to know when the engine was running, and I could connect it to the oil pressure switch, which is what I did. (This wire has be connected ever since I fitted the alarm so I don't think there is a problem with it.)

Cheers, Tom.