You'll more than likely have to replace the whole unit, just take the four dash screws out and unbolt it from the dash. Then it's a matter of unplugging it and replacing.
Just replaced the dimmer switch (thanks to a thread on this site, many thanks)
Now that I finished that end, I am having trouble putting the plastic pieces back together at the base of the turn signal stalk.
I can't quit figure out how the rod and the other two plastic components assemble...