Gear shift panel does not light up

I would drain the trans fluid and flush, replace filter as well, then you know that that side of things is correct so won't be throwing any eronneos codes, don't forget to have the OBD codes cleared before starting engine again.

First check the battery terminals. CLEAN THEM in and out
Otherwise
If you hear a click when you turn the key and the lights dim then it sat longer than 3 months.
If a stick shift you could get it loosened up by towing it in gear.
Use a breaker bar and pipe to turn the main crankshaft
Many other reasons

could be shifter loose or broken.the shift cable could be worn or not in place the c lock retainer could have broken where shift cable barely in place.

Do you have the dash dimmer light control rheostat turned off by mistake?

Have the park/ neutral safety switch checked. this is most likely your problem.
Randy

Hi, i have the same kind of Ardeo and this is how the steer matic shift works.
Stop vehicle and shift gear lever to DRIVE position then press on the steermatic shift button and M will high light above the top of the semi auto shift high lighter to show that you are in the steering wheel gear shift manual mode.At this point you can use the down shift buttons on the front part of the steering and the up shift buttons on rhe rear side of the steering.the down shifted or up shifted gear will high light on the dash.if you want to boot back to semi or automatic drive press steermatic button again.ENJOY YOUR DRIVE

It is the prnd indicator switch on the shift shaft of the transmission,or a shift solenoid,or the valves are sticking in the valve body,try some lube guard,added to the transmission,it is great for stuck valves.

if the shifter is loose and sloppy feeling then the shift cable bracket has come loose under the dash at the steering wheel. remove the lower panel under the steering wheel so you can see under the dash then get flash light and look while jiggling the shifter. you should be able to see the cable and bracket. if the bracket is loose then tighten the bolts. note this bracket is at the steering colum.

I ran into this problem with my 95GMC about two months ago. It was intermitten and then hard failed. I changed out the switch that is operated by the brake pedal with operates your brake lights and allows you to shift into gear. $9 later the problem was solved

Check light on , have codes checked . Transmission not shifting into a gear , could be a shift solenoid . Take your vehicle to a qualified repair shop , before it get's ruined .