Thought the bulb was bad, replaced and still no light.

The side that is dim has resistance in the electrical circuit , use voltage drop testing to find the problem . Watch this video on voltage drop testing .

https://www.youtube.com/watch?v=YaYtCVBodpw&t=1s

Hi,just a thought,have you looked at the light switch its self.
all the best,hope some one can help.

Check for voltage where the wire from the switch connection to the cluster if you have voltage then something is wrong with the cluster

Your remote control I would assume includes a dimmer for the light. CFL bulbs are not compatible with dimmers. If it has a dimmer, you must use incandescent bulbs.

Its the dimmer switch.The hot wire at the dimmer switch is Yellow. Then low beam is tan, and high beam is light green . be sure the yellow wire has 12v. then check the other wires, if no voltage, then connect yellow to the tan or lt green, if lights work, then the dimmer switch is bad.

I thought I had that problem on an 02 outback, so I googled and looked on youtube and found some folks who had pictures and videos of themselves pulling the radio and instrument cluster out so they could replace the bulbs. I even bought new bulbs. Then I discovered the cluster light dimmer switch on the turn signal stem and I just turned them on! So I know you can find this on youtube and a google search, so look there.

You said they are 50 watt GU10's, so I would assume they are 120V halogens, and you must simply have gotten a bad dimmer. But if these GU10's are 50 watt equivalent (LED's or CFL's) then the bulbs will have their own transformers built into them, and would be incompatible with a dimmer switch. It also might be the case that you have low voltage halogens which would use a transformer, shared or individual, and these would also be incompatible with a dimmer. (I don't know offhand if GU10's are available with low voltage halogens.)

have you tried the dimmer switch? its not normal for those to go bad especially all of them at once could possibly be a bad insterment panel

Is it connected to a fan motor also? - most dimmers are for lights only - if there is a ceiling fan connected you may experience a humming sound from the dimmer