[Hurdigurdiman]

I have the 99 C2 Cab.
Everything works fine on the car except the inside lights, door lights and gas door lock are not working. Checked all fuses and bulbs and all are ok. I can put the inside lights on manually but not the door lights. As I unlock with the key or remote the inside light should come on and the gas door should unlock. It doesn't. As I open any of the two doors that door kerb light should come on. They don't. As I turn on the ignition, the inside lights should dim and go out. They are not on. The window drops as I open the unlocked door and returns as it should do when its closed from either inside or outside of the car. The alarm works good. No beeping when the remote is pushed one time. Horn beeps one time when I push the remote two times. (That might be an indication that the alarm is at fault as it should not beep) then again I am not sure. Both of the map lights and the main light work manually.
I would like to know does anyone have any idea where to look for a DIY fix of the problem. BTW its been like this since I bought the car some 18 months ago. I have read in my 996 essential companion book that the inside lights are controlled from the alarm system which appears to be working correctly. Apart from having a diagnostic test done on the computer under the drivers seat at a Porche place, would anyone know another way to DIY the problem. Also has anyone had a diagnostic test done on their vehicle and what was the cost. Thanks in advance. Mike

This is a copy paste request from another forum on request from Wayne Dempsey.