A surprise for me today, on the way to work. The lights that make the active button brighter than the rest, on the a/c control unit, came to life! I thought the bulbs were out, as this has never worked since I owned the car! Now I am worried I have a different problem altogether....

Any input on this? I have recently repaired the relay controlling the driver's side activation of the interior light, maybe this has something to do with it? I do not have the schematics here at work to check yet, just looking for some advice.
Thanks!

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1989 560SEL (172k)
1989 325IC (122K)
2004 Suzuki Volusia LE (3500 miles)
2005 Yamaha Road Star (20 K miles)