Thanks Alloro. Found fuse. It's a 30 amp, encased in a metal jacket,
so couldn't tell if its blown. Pulled it, scraped contacts, stuck it back in
and then the lock switches went "crazy" - clicking off-on-off-on etc. on
both front doors but the lock posts didn't go up and down, they just sort
of "chattered" like they wanted to move. WTF? Pulled fuse, substituted
it with the 30 amp. identical fuse for power windows (which work fine).
Same result....crazy clicking and chattering. So left the fuse out now.
Guess I'm stuck with manual locks like I had in my '76 B250. Damn.
Any further ideas? Thanks.