Immobilised in my work car park!

[rmcdonnell]

Hi Folks,

I have a Porsche n/a 2.7L 1989 that has suddenly discovered electrical gremlins. It is fitted with a Cobra Alarm that has a fob that turns off the immobiliser so the car can be started in the next 30 second period. If the immobiliser is not dis-armed, I believe it stops the ignition circuit from operating, but it may cut power to the DME relay as well, I just don't know. I had some battery problems and had to jump start it from a spare battery this morning, but it stopped at work, and will not now restart. I have replaced and recharged the battery, I have plenty of volts now. Well, at the battery anyway.

Although the immobiliser appears to be turned off with the alarm fob normally, (a red led goes out), the ignition lights no longer light up when the ignition key is operated, so there is no action. When the ignition key is operated a few times, sometimes, randomly, the red led comes back on as if the immobiliser has decided to re-arm. So the immobiliser has at least something to do with the system both before and after the ignition switch. The red led sometimes dims as well which is a bad sign as if there is a poor connection to the immobiliser.

If I want to get round this problem does anyone know anything about this Cobra system? Like where it is, and what it hooks into and defeats!!! Or any relays it operates?

The electrical diagrams for the 944 in Pelican have some of the ignition switch current tracks missing on the page boundarys, can anyone fill me in on the complete circuits, please, maybe pm me perhaps?

I need to know what I can jumper out so I can get the car out of the car park at work..!

best regards
Russell

[Dantilla]

I'm not a fan of aftermarket security systems. Did you install the alarm, or somebody else? Hard to say if it was installed correctly or not, or if it was done to high standards.

The easiest solution is probably disconnecting the immobilizer function, and then sorting it out in the comfort of your own garage. Should be as easy as disconnecting a wire or two. Unfortunately, it may be difficult to know which wire if you are not the original installer.

[shikzachaser]

It is really hard to follow the logic of some of the installers. I owned a relatively high end Stereo / Alarm store here in St Louis in the 80s and the alarms were always a PITA. We constantly got in cars that had aftermarket systems that we had to diagnose. Normally we simply removed them and put the car back to stock, especially for the dealers. We serviced the 2 Porsche dealers here as well as the BMW and M/B stores. Those guys really hate these systems and would not touch cars here that had them.

You may even have an ignition switch problem if you can get it to work intermittantly with the key. The best place to start though is bypassing the alarm.

Steve

[TSNAPCRACKLEPOP]

if you state your location, i am sure someone in your area might help. also, when i had starting problems with my 87 na, i searched starting problems on pelican and i am sure there is an ignition shorting procedure somewhere in there???????????

[TSNAPCRACKLEPOP]

is this car running yet?

[Eldorado]

here's the ignition switch bypass..

Remote Starter

thanks to wilk