You need to remove the door card and inspect the loom for broken wires, tracing back from the switch in question.

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.are all the 3 plugs

, that lead from the door to the drivers footwell, in place?
It's more than likely the switch wires though, as power is getting to the window.

.

.just think of the switch wire(s) as 1 big loop with the switch connecting/disconnecting them to make/break the circuit.

Also look at the connectors that the switch block plugs into, my t-bar leaks and drips right onto that switch, so there may be some corrosion in that area.

Worst case scenario.

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.you will need to run 2 new wires from the switch to the footwell and just snip/twist onto the loom

.

.

.near the connectors.
