The bulbs were all good. As a last resort, I took the TS mechanism off & cleaned it. Somebody put gobs of grease on it, so it wouldn't lock on. I also cleaned the switch contacts, which were dirty & greasy. Works fine now, except I need to go back under the column cover and LIGHTLY gease the TS mechanism.
NOW, I hear a KLUNK with every tuirn of the wheel to the right. the TS pin must be hitting something. Aaargh.