I'd say the problem is in the Ignition Switch (voltage routing). The switch has more than one "output" terminal:
#50 powers the starter solenoid, which works,
#X powers fuses 1-2-3, and your wipers work off fuse 2.
#30 powers fuses 11-12-13, which powers "clicker" (11), warning lights and fuel pump relay (13)
(I would have bet on fuse 13 if you hadn't mentioned the failing "clicker".)
EDIT: My money is back on Fuse 13. In double-checking my frayed Clymer Manual '82 diagram, I see I was mistaken about the fuses. The flasher clicker works off fuse 13 along with the warning lights. So if your back-up lights work (fuse 12), then the feed to 11-12-13 from Ignition Switch is OK.
EDIT: Wrong from here down...
So it looks like no power from Switch terminal #30. All the switch wires are plugged into a module that is fastened to the key/lock unit with 2 screws.
Here's what the switch looks like:

Part # 92032473 (up thru '89), $53.88 for OE at www.getvolvparts.com
(Or try a junkyard part if possible)
--
Bruce Young '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.
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