Hello again Kevin..
You would need a test meter or at least a 12v test lamp / probe.
That is the switch you refer to yes - you have to remove the steering wheel if you need to replace the switch - if yours has an air bag , you must follow proper procedures for safety to remove that...
I will give you a general image to give you an idea as to how it comes apart - I dont have a lot on that age of vehicle, you may find it better to obtain a repair manual should you wish to do the whole job so that you can refer back to it continualy as you work..just a suggestion..
For the image, click below..
Once you are at the switch connections etc its a case then of testing the circuits to see what's happening.
If its not the switch at fault as above, then the control module will be the usual fault - if it should come to that , you will most likely need garage help with that -
When working on the above system / electrics , do be extremely careful - incorrect probing of wires can cause back -feed which can cause damage to control computers on this marque.
Here is the image I promised -
I hope that all helps you further..
Best Rgds, MIKE..-- Please click on the OK rating to Excellent ratings service for me now, Thank you for that...
Rgds, MIKE. Please note, you are rating the content of my "answer" - my help to you - not the "system" which can experience delays etc which are not under my personal control -or delays caused by "time -off" which we all have on occasion - Thank you.