UK Car Repair Questions? Ask a Mechanic for Answers ASAP
You are just talking about the interior illumination of switches, gauges, radio, etc? Did this happen suddenly? And do other functions like the dome lights work?
Did you fix the issue with the glovebox light? all of these are powered by the same power supply relay in the e-box, so if one of them is out it may have caused this circuit to store a fault. Typically once you key off and on again, if the circuit is OK it will work again.
The relay is J689, location B4 in the relay panel under the dash- there is a large relay on each side, and two rows of smaller relays, this is the one on the bottom of the left row. You can try swapping relays with another position if you suspect the relay is bad. But usually it is due to a resistance value issue stored in the module.