Thanks camaroguy. I had already taken the bezel out, and I tried turning it with my
hand but it wouldn't move much. I have seen
the types of housings that have a cover that
goes over the element with a threaded part in
the back, but this one doesn't look like that. It has straight grooves that run the length of it. There is also what looks like
a separate piece pressed on the back of the
housing. I'll take another look at it this
evening, I may need to use some pliers on it.
I didn't want to get to carried away & screw
up my dash.