Thread: Immobiliser/spider/alarm?

You might want to list what sort of Disco it is - as there are a couple of different Landrover alarm systems - Lucas 17VT and 10AS. Or, it could be an aftermarket alarm as a lot of Disco's before 1996 came out without them.

I went out and realised I forgot to put the model...

its a '96 300Tdi

Got a red led under the tacho/speedo, and a motion sensor jobby above the mirror

Probably the 10AS - 315MHz.
Motion sensor above them mirror doesn't sound right though - should be an ultrasonic one above the B pillar on the passenger side.

If it is a Lucas 10AS, the alarm unit is up behind the kick panel in the passenger footwell - green box.

I'd suggest taking it in to someone that has a Testbook /Rovacom or whatever to read that alarm ECU. This ECU also controls the remote entry.
It might be something simple like getting the fobs resynchronised to the ECU.
Maybe first try putting a new battery in your remote.
The flashing Hazard lights are normally triggered by an inertia switch inside the Alarm ECU ( I'm pretty sure anyway). This is only supposed to happen after a fairly hefty jolt.
Whatever, all your problems seems to be pointing to the alarm ECU.

Cheers for that,

I'll try the battery and go from there,

Plan to run wiring behind dash this weekend for switches etc so if this infamous spider is there it's going whilst I'm at it!

Started playing with this again today,

The alarm is factory, but... there is an aftermarket central locking system.

This system is not connected into the alarm, all the factory central locking wires have been cut.

I have put in the plug to disable the spider which is a start although I would like to totally disable the alarm system.

Is there an 'easy' way to do this? possibly just jump pins on the plugs like for the spider?

The alarm module is so sensitive even touching it activates the hazards.

Am going through the wiring diagrams now, hoping to find a way!

I have heard of people removing the alarm unit. The only issue would be how to bypass the interlock for the starting circuit.
If you do a search on this site you might find the old thread about which pins you need to jumper.
When you work it out I'd like to know myself, so I can make up a bypass plug for the alarm unit in an emergency

The other option would be to remove the circuit board out of the alarm unit and try resoldering any dry joints. A bit risky however because you could end up stuffing it altogether.

Found itConnector C274, White plug - jumper pins 1 & 2.
Can you take some pics if it works and before you put it back together Tkx.
Oh an Thanks Langy for the orginal post. !

EDIT : However having a look through Rave, it appears that where a spider is fitted, the alarm ECU talks to the spider through a data signal, and controls the engine immobilisation via the spider. Theoretically therefore, if you have bypassed the spider you should be able to just totally remove the alarm unit and everything might still work. ( except the alarm of course ). Mabe try that first.

Tried that last night,

Unplugged, both, just the green, just the grey will not start under any of the conditions.

Will try the jumpers now