Sliding Roof And Interior Lights Don't Work!

[Ron747]

I have a 1993 ES 300 which is still a great car except for the occasional problem. Last summer it was the burning smell in the cabin which was my instrument cluster slowly melting down Finally fixed that and now another electrical issue.

The interior lights, including the vanity lights, personal light and dome light as well as the sunroof controls do not work. Everything else works. I have checked the fuses and they are ok. Looked at the online Lexus manual and all the wires feeding the ceiling lights and sunroof go down the left front pillar and terminate in the rear of the fuse panel below the instrument cluster. Based on circuit drawings in the manual I am suspecting the integration relay. Any other ideas on what the problem might be? Thanks for you help.