This problem is happening with my R32 91 GTS.

Both my low and high beam lights went out on the left side (separate
bulbs) so I first checked there was power on the connectors (there
was) and so i replaced the bulbs. They still didnt work, I realised
that as soon as a bulb was plugged into the connector (two pin push-in
type connector) there was no current on the wire. I tried the other
sides known working bulb and still nothing.

I dont think its the light switch because the high and low beam
switches in the car are separate switches (one is a twist knob and the
other is the indicator lever)

Any suggestions?

Flamer.