Q7 rear light faulty (techy)

[tim12345]

Drivers side rear light cluster is completely out now - sometimes 1 bulb works (it has 2 bulbs each side), sometimes both work ok, opening / closing the boot sometimes makes them work!!!!!
Anyone have any experience of temperamental rear lights. Ive changed bulbs so it must be something in the electrical system somewhere? - earth connection but not sure where it is on the rear.

[chimp427]

You need to check the multiplug connection is seated correctly at the light first,sounds very much like a dodgy connection.
Sometimes minor corrosion at the plug connections can cause this type of issue but i would not expect to see it on an audi.

[shtu]

Earth pin at the multiplug. Check it first.

[Dr G]

It's normally corrosion or water ingress somewhere at a PCB or wiring level. As above, check nothing looks grotty or scorched and that the earth actually goes to earth.