I just finished up the non-navi to navi conversion. What i noticed is when i turn the headlights or even parking lights on, the radio and cluster lights turn off.

I saw the dash and radio light flicker on for a sec. but immediately turned off.

I checked the fuses and they're still fine. Is there a loose ground possibly?

 

is your dimmer switch turned to the max brightness?

 

dimmer switch is turned to max brightness.

power seems to cut out for the cluster, radio, and climate control light when parking/headlights turn on.

 

anyone with any ideas?

 

you battery's load capacity has depleted too much to support everything when the lights are on?

 

I hope you're right.
i'll test out this theory and drive around for a bit later this evening.
if that doesn't help, off to my mechanic it goes

 

After two months or so, i haven't fixed this issue (it wasn't the combination light switch).

Does this sound like a bad multiplex on the driver side?

 

Pull the corresponding DRL fuses. I have 17” TLX V6 Tech. Interior panel fuse no 2 and 27 for parking. BAM! That simple. Lol. Goes old school. But always no DRL.

 

I don't think the OP needs the help after all this time has passed. But I hope it helps some one else out who comes across this issue lol.