Don't know how to check safety switches on Murray 17.5 rid. Mower. Batt fine. Sol. sw. fine. Starter fine. Fuse fine. Cleaned all term. Air blasted all saf. sw. plugs. Still nothing when key is turned. Will jump start. Don't really want to start trying to bypass all of them. I know where they are, just not how to check them.

Hi,
Do not know without some numbers, remember I cannot see anything from here. First I would try unplugging all the connectors as that can be a common place of failure. It has fixed more than a few for me; unplugging and plugging back.
Peace,
Clarke