immobiliser wiring

Black Pig · 04-10-2007, 04:34 AM

I have an H&P immobiliser ( PWB labeled as 1992) which has been disconnected from the car by cutting through the thick black wires. I am able to open the unit, so I can trace the wires to their destinations. Does any one know which is which? in particular the power in and ground. The key wires are un damaged.

T_MaX · 04-10-2007, 09:36 PM

H&P immobiliser? How about some electrical schematics or pictures, a website to H&P immobiliser?

Last but not least! What car are you working on; we need Model and Year?

Black Pig · 04-11-2007, 12:10 AM

H&P make the OEM immobilisers for several manufacturers including porsche, and typicaly they work on several circuits simultaneously. They are very well engineerd , housed in a welded steel box and silicone potted into the box. In the case of my example the silicone didnt bond to the case that well, and I was able to eventualy prise the whole free with out damage. My car is a Euro spec S2, but given the immobiliser is dated '92, and the car was made in 84, it has to be a retrofit. The key socket is still available from Porsche. I'll adda picture this evening... Mind I might also attack the circuit with a meter and work out what is what the hard way. It all depends on the kids going sleep.
thanks,
John

T_MaX · 04-11-2007, 08:12 AM

John, are you British? The only reason I ask, is that what you call an H&P immobilizer, here in the states maybe called something else. I’m looking forward to your pictures.

Black Pig · 04-25-2007, 12:31 AM

The three black wires centre picture are the area of interest, the right wire is connected to what I take to be the ground plane, the left and centre are i think power in and ignition fed power to hold the device on when the motors running. I have tracked the remaining wires to individual relays.
sorry its taken so long to get the pictures sorted.