The Lotus Grand Tourers

Does anyone know how to disconnect the ignition immobalizer from an 87 excel se

Difficult to say as Lotus didn't fit one as standard.

Do you know what type of immobiliser it is ? (or can you describe any of it to us to see if we can help to identify it? )

This is easy.

The plug for the immob looks like an electric guiitar amp plug, with an elongated Z symbol.

News to me! My immobiliser has about 15 connections to various things, including blinkers, fuel pump feed, start circuit. If I just pulled the plug out of the black box it would....fail to proceed

Robert - I think he means the "touch" connector.

It sounds a bit like a Laserline point to me - does it have a flashing LED in it too ? Any chance of a photo or two (or more ) ?

Yes...

the touch connector that you insert into the steering column looks like an amp plug.

The flasing light is on the steering column, not the fob

CHances are that one of the wires( the important one), will go down to the ignition relay behing the lower panel by the driver's right footwell.

It's the one with the big white wire going to it.

The others will be 12V supply and the door/boot switches.

I had so much trouble I just pulled it all out.

Replaced it with a wire going from the live side of this ignition relay, to a hidden switch in the glove box, straight to the horn/siren in the engine bay.

If the switch is on, and the ignition is activated the (very loud) siren goes off 'til the battery's flat!!!

Terry

Immobilisers are designed to be difficult to bypass. Most of them work on at least two different circuits so that even if one is bypassed successfully, the other will still not work.

If you can locate the actual immobiliser (a favourite hiding place is in the passenger footwell, I think - possibly on the back of the relay board there) you might just be able to find out what type it is. The next problem will be, assuming a correct installation, that all the wires are the same colour and will need to be traced individually...