Instrument lights dead

[soundguy]

97' base Boxster, Tip, 102K. Driving home last night, pulled into a driveway to drop a friend off. Put the car in park for a minute, and as soon as I selected reverse the instrument lights blinked and went dark. They did pulse at a really low, barely visible light level. This was accompanied by a really soft pulsing sound coming from somewhere around the center console. Drove home. As soon as I removed the key, the sound disappeared. No, there was not a spaceship following me...

I was having some work done on the car this week, and the front wheel sensors and harness were both replaced due the cracking. I'm not sure where the new harnesses were spliced in, but could this have led to the lights going away? I need to follow up on this with the shop.

The instrument lights have never been as bright as I'd like, even with the dimmer turned all the way up. Please help solve this mystery!

Thank you.