Ever since i have had my mark 1 octy i have had an issue thats been bugging me as follows...

The electric windows will wind down fine until i switch the lights on then they judder and are a nightmare to get up or down but when i turn off the lights they work fine.

The rear passenger back door has been dead since we bought the car as the central locking never worked on this one door nor did the electric window however today the window wound down (the kids pressed the button on the door) and it would not go back up...

It then came to light that when i pulled the plug for the door in the back rear passenger door that the windows would work without juddering even with the lights on when i plug the door back in (through the connector block in the door jam) the windows will judder when the lights are on but fine when the lights are off.

I have found that this is obvious that its something to do with this back door as when all power to it is cutt off everything works fine but i cant work out how this would effect the lighting circuit its apparent to me that the back door is putting some form of load on the lighting cuircuit when its plugged in but dont know why or how it would be taking current from this cuircuit as there is nothing in the back doors to do with the cars lights.

If anyone has any pointers on what earths to check this would be fantastic, or is it likley to be something to do with the actual wiring in the back door that seems to be causing the problems when its connected to the car.

I know this is long but any help would be great.

Thanks

I've gotta say you do have a lot of patience with your car, if it were mine it would be over a cliff top by now. Hope you get it sorted.

...The electric windows will wind down fine until i switch the lights on then they judder and are a nightmare to get up or down but when i turn off the lights they work fine...

Do you mean the headlights or interior lights?

Do you mean the headlights or interior lights?

Its the headlights when they are on the windows dont want to know until i switch them off.

Thanks

I've gotta say you do have a lot of patience with your car, if it were mine it would be over a cliff top by now. Hope you get it sorted.

Its a love hate relationship mate lol :D

Anyone got any pointers for this, I am going to take the loom out of the door and look at it, I know earths can do strange

Surley if i am disconecting the door and everything is working ok then its got to be wiring.....has it....:confused:

OK, first thing I'd do is disconnect the headlight leveling adjustment wheel. IIRC, it unplugs. Does the problem go away?

OK, first thing I'd do is disconnect the headlight leveling adjustment wheel. IIRC, it unplugs. Does the problem go away?

I will do that now mate, But just to let you all know i have replaced the whole wiring loom in the affected door and its still the same,

Will look at the headlight leveling ajustment wheel now and get back to you

OK, first thing I'd do is disconnect the headlight leveling adjustment wheel. IIRC, it unplugs. Does the problem go away?

Done this and it was still the same mate lights on windows struggle pull the plug to the electrics for the rear passenger door and the windows work fine with the lights o.

Damm electrics.

sounds like a fault in the wiring going to the rear door

or in 1 of the parts in the door

OK. That excludes the adjusters which are fed from the headlight switch.

Try pulling F3 to disconnect the interior lights. Does that make any difference?

Next would be to check the earth points. Taking the largest diameter wire you can find, check the voltage between the battery negative terminal and the earth point. When you switch the lights on, the voltage should remain almost zero. Jump leads would be good for this as they are designed to clip on to the battery and have low resistance. Two in series is OK as long as you wrap a plastic bag around where they are clipped together.

The earth points are...

Next to the Steering column.

Up behind the dash panel.

On the 'A' pillar.

Hint. Look for brown wires.

by-pass surgery perhaps? run a new switched line from the fusebox to the window and to heck with the original one?

sounds like a fault in the wiring going to the rear door

This could be anywhere, I have disconected the componants one at a time in the affected door and it does not make any difference.

I have pulled F3 as suggested and still no difference,

What i have also noticed is when i have the ignition on every window apart from the rear passenger door works but when i take the key out of the ignition the 3 windows that work normal dont work when the ignition is off but if i go to the affected door the window on just that door winds down on the door button but not from the drivers door buttons.

It is after around 2 mins that that door window dosent work, I have also noticed that the switch button led is permantly on even when the car is locked.

I will check the earths.

Just also noticed aswell that when i have the lights on the back "drivers" side door switch led is flickering on and off but when i disconnect all the wireing from the rear passenger door the flickering stops on the back drivers side passenger door switch led and as pointed out all 3 remaining windows wind down with the lights on.

So there is something that i happening as its like the affected door is taking power from somewhere else.

Does it sound like earth leakage somwhere, I am bloody determind to get to the bottom of this :rolleyes:

Check the convienience ECU and its connections for signs of water ingress and rust.

Check the convienience ECU and its connections for signs of water ingress and rust.

Checked this mate, its up under the steering colum and appears to be dry and the blue connection block seems fine.

A few weeks back i tried another conveinance ecu from another octy the same year and it was all the same.

So it looks like wiring and as we know wiring faults can have you stripping the whole car, losing light here now so will try and do what i can regards the earths.

Just a thought it wouldnt be anything in the front passenger door will it as the loom for this door connects to the cars loom in the a pillar on that side then from where it connects the wiring then goes along the top of the sill inside the car and up into the b pillar where the connection is for the door thats dead.

I would love to get this sorted as its been like this ever since i got the car in april last year.

checked the earths in the a pillars and there is no voltage shooting up on the metre when i put the lights on. I lost light though so will check the earths on the steering colum tomorrow.

After a scan on the conveniance ecu i have this....

Address 46: Central Conveinence - 8 Faults Found

01334 - Door control moduale: rear right (j398) 49-00 no communications

01333 - Door control moduale: rear left (j388) 49-00 no communications

01332 - Door control moduale: passenger side (j387) 49-00 no communications

01331 - Door control moduale drivers side (j386) 49-00 no communications

00931 - Locking module for central locking: rear right (f223) 54-00 incorrectly equiped

00929 - Locking module for central locking: front passenger side (f221) 27-00 implausable signal

00935 - Electric window motor: rear right (v27) 62-00 no or incorrect adjustment

00931 - Locking module for central locking: rear right (f223) 27-00 implausable signal

I cant work out why its not seeing all 4 door moduals as 3 of these are working without fault!!! its only my back rear passenger door that is given the greif.

This has got to be wiring (hasnt it :confused:) Im not even going to contemplait replacing every door modual :eek:

Any other pointers guys.....

Cheers

The no communications i am persuming means that there is no signal going to any of the doors or no signal being returned from the doors.

But why do 3 of them work without any problems.

£500 for the first person who can fix it.....only kidding just been belted from the wife

I am hoping it wont cost £500 notes though to get this mess sorted

The no communication could have been caused with you messing around with the wiring to the door. I think the last 4 are relevant, if you clear the codes I think only the last 4 will come back assuming the wiring is not disturbed in the meantime.

Thanks I have had them cleared and they come back with the following...

Address 46: Central Conveinence - 3 Faults Found

00931 - Locking module for central locking: rear right (f223) 54-00 incorrectly equiped

00929 - Locking module for central locking: front passenger side (f221) 27-00 implausable signal

00931 - Locking module for central locking: rear right (f223) 27-00 implausable signal

What does incorectly equiped mean, Thanks for all the help on this everyone.

Anybody pleeeeeaaaaasssseeeeee heeeeellllpppp meeeeee

Is that motor the right one for the car?

Can you get another one from the breakers yard for not much to confirm it isn't a fault in that causing all the problems.

I have tried 2 motors in the affected door but still have the same problem. Do you think it may be something with the main ecu? I am not sure but does the conveniance ecu connect thru the main ecu at some point.

When it stops raining and have some time i am going to remove the glove box and fan motor pull the carpet up and check the wiring loom as it enters from the bulk head and heads towards the effcted door.