over the summer we bought a 93 240 wagon with front end damage (otherwise in pretty good shape.) i repaired it with parts from a 77 240 - including front fenders and grill and lights. the 77 had the two large round headlight set up. i cut off the 93 headlight, running light and blinker connectors from the 93 main wiring harness and spliced in the 77 connectors.
all the lights work, but the headlights are a little dim. as a rough guess i'd say they put out 70 percent of what an 85 quad set up puts out.
also the dash high-beam indicator stays on for both high and low beam settings. and when changing from bright to low beams, the bulb failure indicator light flashes on briefly.
the 77 headlight bulbs themselves have been on a shelf for five or six years. before that they were in use for a couple of years. maybe new ones will be brighter - could anything else be going on here?
thanks,
harvey