Breezy_Pete

I'm away this week anyway, but it sounds like a relay change by post might be feasible with a bit of planning. Code read/write usually done via the diagnostic port, but unnecessary if relay is changed on original unit. Not too sure how to eliminate all other possibilities, but intermittent work/not work wouldn't surprise me with burnt contacts.

It was unlikely you would be neighbours, but worth asking.

Yes, there are threads with photos and descriptions of process. Most mk2 Fabias and Roomsters currently on the road will have at least one broken, or repaired door loom wire, I expect.

Are you anywhere close to this place? https://www.1769.fi/ I know the guy that runs it. He would solve this very rapidly if you need help.

No VW or Skoda dealerships?

From where did you buy the replacement brake light switch? Genuine are not heartbreakingly expensive.

There's a plug/socket pair at the A-pillar, the wires that break are part of the door loom side of that connection, within the rubber boot. Access is awkward for in-situ repair, but do-able with patience and a modicum of dexterity and soldering and heatshrinking. (Door) Loom replacement is the official fix, but there are a multitude of kits on ebay etc that consist instead of just the female connector, plenty of pre-crimped contact inserts with short wires to fit into it, and you just cut and shut these into the existing door loom beyond the point where they flex in the door hinge area. Solutions for all.

@PhiloB whereabouts are you based? There's a way of testing the motor by just shorting two of the contacts of one of the plugs that goes onto the control unit, immitating the relay being energised. Possibly not going to be easy with a bad back though. Coding a replacement control unit (on a pre-March 2010 built car) is very easy, just one 5-digit code to read out of existing and drop into new one once installed. Registered copies of VCDS Lite can do it, as well as full VCDS. Another control unit might have a relay with contacts that are also worn out though. Can't remember if I have one at the moment and can't check this week.

There is one unused connector I can think of. It goes to the gearbox, top of diff area next to offside driveshaft flange. Before ABS modules used wheel speed sensors to calculate road speed, there used to be a speed sensor there. Now the loom connector just plugs into a plastic dummy sensor. Not much help in your quest, sadly. It may have even been designed out by 2009, not sure. Have a look.

No, unfortunately you'll barely find a spare centimetre of wire in the bits supplying items that are fitted, let alone any spare connectors for things that aren't.

Quite possibly the relay inside the BCM. There's a guide to replacement in the Fabia Guides section. Soldering involved. Yours will be the BCM with part number suffix F, the second relay type mentioned in the guide.

Yes, single XZN (not Torx). M8 size from memory.

Dead ends will be broken wires, unless you just mean apparently unused positions in the connector? It's surprisingly easy to remove the door entirely. Unplug connector, one XZN screw for the check-strap, two 13mm nuts one in each hinge. Would make access for repair massively better. Nearly did that myself last weekend on a Roomster, but there was only two busted wires, so I carried on in that horrible cramped space.

Yep, with mk2 Fabia and Roomster, always the most likely problem.

Had the same two oddities on ours, I think.

Probably this, similarly font -confused: F0A = no special purpose vehicle

Pretty sure BWB is meant to be 8WB, front fogs. Can't remember the other, and can't look properly just now.

Have you checked the strip fuses above the battery? Think it'll be fuse 4 on your car.

Under the longitudinal box section or under that console mouting point are good places to lift, or support once lifted.

What was it in the end please Anton? I guess a couple of quid didn't buy a replacement BCM?

Scan the HVAC module for stored faults. Don't be too surprised if there's a code related to V68 heater flap motor.

Scroll down this page to the third from last, and last diagrams, click on each for all the info about both of those PR code brake set-ups. Car Parts Catalog - LLLParts

Don't blame you. All the best with the Citigo.

Most people are out of date with what Skoda UK are now recommending. Would expect forum regulars to know though, loads of recent threads on the subject.

Thermodynamics tends not to though.