Reply to "Lights go up but will not go down"

Hey Trum, as 1715 said, these are some of the simplest switches in the world. If you take them apart and clean them up there is a very good chance they will work properly for you.
If not, I had one that was broken to pieces, so I replaced mine with a generic switch found at a computer supply store like Altex. They had an assortment of them.
As you can see in the picture, I lengthened the bolt that operates the "up" switch because I have the low profile lights from Kirk Evans that don't have to open as far. You can bend the tab and make them just like stock if you want to. I put these on when factory ones were not available just to get me through inspection, etc. It's been 12 years now and they still work fine.
I did have to do some bending of the lever on the other limit switch, but don't have a good picture of it.
I think the switches cost something like $7.50 each. I haven't seen a reason to go back to the expensive ones as these have worked so good for so long.
Good luck,
Mike

p.s. Forgive the dust, I've just been for a drive