vectra door electrics

Could someone please help me as my head is done in at this stage. i have a 2002 vectra 2.2dti. the other day all the electrics in the drivers door stopped working, the central locking wont work on the drivers door but works on all other doors. the driver or passenger windows wont open from the drivers door panel. or the key fob, the passenger window will open from the passenger panel, the boot lok wont open from the driver panel but will open from the passenger panel, same for the door lock switch, and lastly the mirrors wont open from the drivers panel. the control switches on the drivers door are not illuminating, so i thought it was power, i took of the power blok to the door and tested it and it is putting power through, there is an siemens electrical circuit box behind the door panel and it is receiving power to. I have checked all the fuses at the passenger side, under the bonnet and in the boot. please help, i am at my wits end.

Reply to
pcg.farrell
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Is the earth wire to the door electrics intact?

Reply to
Duncan Wood

Yeah it deffinately is cause i am getting 12volts from touching the red and brown wires with the multi meter

Reply to
pcg.farrell

Check with a bulb instead of a multimeter, if there's a high resistance joint then you'll still get 12v with a multimeter, but the bulb won't light up.

Reply to
Duncan Wood

Are there any warning lights on (should come up in the LCD display in the instrument cluster if there's any faults)?

Regardless though, it'll have to go on some diagnsotic kit, as it's all CAN bus electrics But by the sounds of it, the Drivers Door Module has died. It might just need reprogrammed (sometimes if they get a voltage spike, they can loose their configuration, and reprogramming them sorts them).

But whatever you do, get it sorted sooner rather than later. Should another module on the low speed CAN-bus fail, then the immobilliser will kick in and you won't be able to start the car (the system will let the car start with one unknown/faulty module, but two or more, and it'll shut down as a security measure)

Reply to
moray

A DVM is useless for checking for a poor connection as it draws no current. To check for a poor earth between door loom and body set the DVM to read

12 volts and connect from the door loom earth to a good one on the body. Now operate the locking etc and see what it reads. With a good earth it will read zero. If the earth is poor up to 12 volts. Voltage drop tests under load are the correct way to check car electrics.
Reply to
Dave Plowman (News)

Thanks for that, i have checked it with the bulb and its lighting fine, so there must be power getting to it.

Reply to
pcg.farrell

Thanks, there are no lights or warnings on the instrument cluster. What is CAN bus electrics? and should i go to a main dealer for diagnostics? there are loads of small garrages that do it, but i have went to them before and they can rarely identify the problems?

Reply to
pcg.farrell

thanks for that, i have tried that and i am getting zero, with a good earth on the body, when a attach a buld to the power its lighting straight away, so i am getting power at the module plug.

Reply to
pcg.farrell

Personally, I'd got to a dealer. The problem is although there's lots of diagnostic kit that'll probably read the fault codes, and tell you if the module is still active, there's not much diagnostic kit that's able to programme and configure new modules, and the chances of finding a local independant with the kit to do the job is slim.

CAN bus is a system where there's only one or two wires joining together all the control modules throughout the car. Should anything happen to that wire, then lots of systems won't work. On the module concerned, it's only connected by a single wire (green in vauxhall's) to all the other modules.

Reply to
moray

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