One of the rear tail lights of my Mk5 VW Golf blew out recently, triggering a bulb failure warning on the dash.
On inspection it was the bulb itself that was broken, so I have no reason to suspect electrical issues.
I bought some replacement PY21W 12V LED bulbs and installed a pair on the rear tail lights. However, when I turn on the lights the LED lights only turn on for 5 seconds and then turn back off. The incandescent bulbs remain on.
If I turn the headlights off and on again, the LED bulbs come on for another 5 seconds, then turn off again while the other bulbs remain on.
I continue to see the Bulb Failure (solid light) on the dash. I suspect this is to do with the lower current of the bulbs (or some other attribute) being detected as a failed bulb and the power being cut after some time out. Is there some setting I can change somewhere, or do I need to go back to incandescent bulbs?