Hi all,

 

Recently I found that both front electric windows have stopped working on my 2007 mk2 fabia, none of the switches work. Also none of the fuses for the windows were blown and the door loom wires are not broken. Strangely when putting the key in the drivers door lock and holding in the unlocked/locked positions the windows would open and close. After doing some research I thought of three possibilities:

1.All the switches have failed within a week of each other (unlikely but possible i guess)

2.the control module in the drivers door has failed

3.the comfort module is malfunctioning 

 

I would really appreciate  any thoughts as to what could be wrong.

 

Thanks in advance.

Try charging your battery if you have a charger.

Thanks for the advice. Unfortunately I don't have a battery charger, but I do have a multimeter so I'll check the battery voltage with the engine off and when running to see if the battery or alternator has problems. I guess disconnecting the battery and leaving the car for a few hours may also be worth a try.

I checked the battery and everything seems ok. The readings were 12.1V with the engine off, 14.5V with the engine running and 14.1V with all the lights, heaters, AC an fans on full (high load).

That engine-off voltage suggests the battery is low on charge and would benefit from more charging than it's getting at present, but the voltages when running and loaded up electrically seem healthy.  Seems unlikely to be the issue, but may be worth borrowing a charger to improve its state of charge without having to go for a long 'non-essential' drive.

 

So I think my next question would be which fuse numbers have you checked? Did you include fuse 11? 

The battery is duff, 12.1V means it's being charged but it's not holding that charge.

On 26/02/2021 at 04:32, Wino said:

That engine-off voltage suggests the battery is low on charge and would benefit from more charging than it's getting at present, but the voltages when running and loaded up electrically seem healthy.  Seems unlikely to be the issue, but may be worth borrowing a charger to improve its state of charge without having to go for a long 'non-essential' drive.

 

So I think my next question would be which fuse numbers have you checked? Did you include fuse 11? 

Thanks for all the advice, I don't think I did check fuse 11 so I will do that as soon as I have time. Replacing the battery may also be a good shout as its at least 5/6 years old and probably worn out. Also I think I should add, recently I replaced the driver's door wiring loom, it is possible I may have damaged a seal or vapour barrier resulting in moisture  ingress. Could this be a cause?

Its a;ways a possibility you may have damaged something or not connected things correctly. Get that battery replaced and you will have a fresh starting point. Fabias DO hate weak batteries!

Update: just got in the car and the electric windows are working again, how i am not sure. When I get the time I will definitely be replacing the battery as the last thing I need is to be stuck in the middle of nowhere. Also I will remove the do card, check/fix all the seals and make sure there is no corrosion on any of the electrical contacts.

 

On a side note, how well do fabias hold up at high mileages? mine currently has 100k on the clock, it has the 1.4bxw engine.

Around 160,000 on mine (BMS lump) so far but the engine was replaced at around 50,000 due to oil pump/chain fault, under warranty. I have seen many with this sort of mileage so with regular service, etc, its good for at least that!