I am having the same issue: Interior light, Radio, and Instrument panel Clock not working... but all the lights come on at engine start and the car seems to run well otherwise. I will continue to search the forums for an anwer.
History of my problem... in case you have a similar issue or don't know why you have this problem:
I attempted to jump the dead battery in the dark and 'stupidly' managed to connect the possitive lead from the good battery to the negative terminal on my dead battery. (I have since reviewed in depth the correct method for jump-starting a vehicle).
After a good shower of sparks the vehicle was COMPLETELY dead. The next day with the sun up I was able to check all fuses and found I had blown the 100A 32V ALTernator Fuse in the Engine bay fuse box. This was screwed into place with the cables from the battery. After replacing the fuse and installing a new battery the engine started up fine - with only the above issue. All interior fuses check good. I have to check out the relays in the Engine Bay fuse box... but hoping I didnt' blow a control module.
The search continues...
Associated Threads from this forum:
Electrical problems on 2001 Lantra