Electrical issues with 2004 Lesabre Limited

Hello,
I have a 2004 Buick Lesabre Limited and am experiencing a strange electrical problem. Over a dozen of the small backlights behind various switches and buttons have gone out. Five of the backlights
behind buttons on the AC control panel are gone; at least two of the backlights behind steering-wheel mounted buttons controlling the radio and the cruise are out (and the cruise set/resume/accel switch no longer functions at all), as well as lights for the passenger climate control and certain of the radio buttons.
No one area of buttons has failed, so I dont suspect something simple like a fuse, but there has to be something to explain so many failures in such a short time for a relatively young car. It was bought brand new from a dealership, has never been in any kind of accident, is driven almost exclusively on the highway (commuter car, some family travel) and has been garage-stored. Sadly, these started occurring just outside the mileage limits of my warranty.
As an aside, my mom owns a 2005 Lesabre, and *she's* started to experience switch/light failures on her steering wheel. Getting it fixed was a nightmare even though she was under warranty, because the dealership basically didn't know how to fix them correctly....
I'd appreciate any suggestions or ideas to explore on this issue.
-David
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It appears that these lamps are controlled from the dimmer section of the dash integration module.
Perhaps the lamps are actually burned out? High voltage on the system? Recommend checking with a multimeter. Also recommend checking the bulbs to find out if they really are failed. Knowing this will narrow the search to an extent.
There are a number of splices in both the power and ground wiring for these lamps. A problem with one or more of these?
Other components for the steering wheel lamp circuits include several inflatable restraint steering wheel module coils.

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snipped-for-privacy@gmail.com wrote:

Cruise switch embedded in the steering wheel was replaced by out dealer in <90 min including a car wash.
Find another dealer.
-- pj
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