As said in the other thread, replace both bulbs. One or both of them may have an intermittent fillament. Make sure that the new bulbs are 5w ones and not 2w ones.
Help! My rear number plate lights have stopped working. I changed them over to Error Free Canbus LED Festoon Bulb. They stopped working after 1 min. And then couldn't get them back working. So changed the bulbs again to 6 Diode LED Festoon Bulb. These have not worked either. What could be the issue help very much needed and appreciated!
Have you tried putting the original non LED bulbs back in?
Thanks for the help guys, took it to the local garage and they plugged it in and had to reset it, as it had registered a major fault. Apparently minor lights, like number plate and sidelights don't have a fuse and run straight from the cars CPU, and so if a fault is detected it completely shuts down, and it then required VCDS to tell the car everything is ok before it will run the circuit again. Normally a bulb going would register a minor fault and so the car would just try again when it's next switched on hoping you'd have changed the bulb by then, but a major fault is something like a short and and so it shuts down to protect the CPU. The garage thinks the LED's will have shorted and the car went into self-defence and cut the power.
Sorry it's so much to read but I wanted to write it out then if anyone else has this issue they can hopefully find this as I couldn't see anything similar to this problem on here before I started this thread.
i would be amazed if an LED bulb has damaged any of the wiring. I'd be asking for proof and to see the damaged section of wiring. Normal bulb and a clear of the fault codes and it'll probably be fine
Hi. I bought a 2011 seat Leon copa recently. Love it but the warning light for a build out keeps coming up on the dash. I changed my headlight bulbs recently to something a bit brighter and changed my rear reg plate bulb cause the dash said it was out. It's not led bulbs just standard ones. Dash warning light is still on and now my lights aren't working properly. Please help as I need my car to transport my disabled daughter. Thanks Fiona