I am trying to work out the best way to easily immobilise my type 2. I would like to have a hidden switch inside the van probably at the back somewhere that immobilises the ignition and turns on an flashing LED on the dash. I think its best if it is still possible to turn the engine over with the key or if hotwired so that the thief thinks they are getting it started but of course it won't. I don't want to have to get into the engine bay each time and remove the rotor arm or other wire as I know I just won't do it every time.
I have heard that you can put a switch in the (-) low tension lead to from the coil to the distributor but that would be easy to find as it would be a long wire where there should be a short one. I have also hear that an extra wire from one side of the coil allows you to ground out the coil which has the same effect of immobilising the ignition. I could do an electronic fuel cut off but they cost about =A350 so I would like to explore cheaper options first.
Does anyone know any more about doing this? Apart from the coil getting very hot if the ignition is left on - are there any dangers in doing this? I have a Pertronix Ignitor instead of points.
Any other suggestions?