I just bought a car with non-functioning cruise control. It’s not that big a deal for me that I’d have it professionally fixed, but I was looking around at what the cause might be with an eye to fixing it myself if feasible. Problem with the internet as is so frequently the case, is that you get too much information and not enough geared to the specific case at hand. So I’m wondering if knowledgable car people can narrow down the possibilities based on the specifics in this case. Which are:
the CC is completely non-functioning (i.e. pushing the button has zero impact) and
the light on the dashboard also does not light up.
[I’ve already checked the fuse. It looks good to me, but I didn’t test it.]
Also, are you using it properly? I couldn’t turn on mine, then I read the manual, it will not activate below 40 mph. Doh. Since you said you really weren’t interested in using it, maybe you’ve missed this issue, or something else about it?
I also have an identical 2000 Prizm that I drive to work, and I use CC routinely. (The recent purchase is primarily for my daughters to drive around town with, so I don’t care all that much in that car. But I tested it at highway speeds.)
Since you’ve got an identical car, you could always start swapping parts and see if anything makes the problem migrate. The switch and the module would be at the top of my list of suspects-- if either of those are fairly straightforward to change on this car, it might be worth a try.