Unknown warning light

[VeeDubs]

phew its only brake pad warning.

[Treza360]

A simplified explanation of how the brake sensors work, is they are a closed circuit system when the brake pads are healthy (i'm going to assume that it's the same in the older cars as well). I don't know the exact specifics.

On the brake pads there is a thin metal strip which you plug in a harness on each end of the strip. Once the brake pads wear down they wear through this strip and and therefore cut the strip and open the circuit thus triggering the warning light (normally closed relay or a signal into a module or cluster).

If you replace the brake pads with after market ones or don't connect up the circuit again, the light will stay on. The easiest way to fix this is to short the two cables together on each pad. Depending on the setup you may need to solder the two together with a bridging wire, or you might be able to make a pluggable wire etc. The most important thing though is to make sure you tuck and secure the cables out of the way so they are not dangling where they can get caught in the wheel/hub/brake assembly.

Not sure whether the newer VWs are using technology this simple or whether they have gone to something more advanced and fancier.

Cheers,
Trent