MGH

Thank you again or all your assistance. I'm going to upset the purists amongst you but this is an almost 20 year old car. The problem was the live feed to the flap release motor Red/Yellow. I couldn't find connector A4 behind the dash but, as the Central locking and Boot lamp were all OK, I decided to cut the yellow/Red at the fuel flap motor (suitably insulated) and take a battery feed from the boot light. All reassembled and working. Thank you again for all your input and without Briskoda I wouldn't have found the wiring diagrams I wanted. £7.50 well spent 🙂

Thank you all very much for your input. I have been away for the past week and have not pursued the issue further. However, before I went away I discovered 'erwin' elsewhere in this forum and £7 later I located the relevant wiring diagram for our model Octavia (attached). It does look as though the 'live' Yellow/Red wire from Dash connector to Flap motor connector is open circuit or HR. I will delve further and post what I find (or the work around). Full 12.5 volts on both sides of the fuse and central locking/boot light working ok. Whatever he issue is must be after the fuse 😞 but thanks for the suggestion. Diagrams support what you have said.

Mike, Thank you very much for your link. Much appreciated and a very useful manual but unfortunately, no wiring diagrams 😞 JR, Thank you for your advice. I have stopped stubbornly thinking that its a 'hard wired' circuit and accept that there must be some sort of 'switching' going on between the dashboard switch, which works (metered) and the release motor , which also works ('hot wired' to a 12V source) Having put away my trusty 12v lamp tester and picked up a meter I can confirm the following: Battery voltage 12.5V Fuse voltage (to vehicle chassis) 12.5V Dashboard switch (Blue/Red and Brown) 0V across the connector or from either wire to chassis (there may be a very small capacitive milli voltage, too fast for the digital VM to register properly, would need to put a scope on it or maybe an analogue meter). However, the switch is doing something, see below. Flap release motor connector with dash switch open (Yellow/Red and Blue/Red) 0V across the connector but 10.9 V on Y/R to chassis, Bl/R open circuit to chassis Flap release motor connector with dash switch closed (Yellow/Red and Blue/Red) 10.9 V across the connector I would have thought 10.9V would be enough to get a noise, at least, from the motor but nothing 😞 (It is a whirry motor and return spring not a solenoid) Where does the Yellow/Red wire come from and why only 10.9V? Some sort of hidden 'switching' circuit? Any clues would be gratefully received, from anyone please.

I haven’t tried hot wiring because I can’t identify + and - as neither side appears to be connected to chassis and in any event there is no 12v at the switch. Please, if you have diagrams I would grateful. I’m new here, do you need anything from me to PM them?

We have Mk1 Octavia 2004 and the fuel flap has stopped working. The release motor bolt is not jammed and motor shows a resistance on the meter (not open or short circuit) but I get no power to the connector, have no power at the switch but the fuse (F38) is OK, boot light and central locking also working OK. I either am looking at the wrong fuse (the obvious culprit) but with no diagram I can only go by the fuse list. If anyone has any ideas or can point me at a wiring diagram, I would be very grateful