Son's '92 240 had recently lost passenger side tail lights, instrument panel illumination (weak as it is when it does work), climate control lighting and AT gear selector lighting and would blow fuse 16 when the headlight/parking light switch was turned on. But headlights worked. Swapped in good bulb out relay, good main headlight relay (located behind coin tray in '92 instead of down by driver's feet in earlier models), known good headlight switch, good tail light assembly -- all to no avail.

Then I remembered a post about reflowing soldered connections on instrument panel circuit board -- as I'd had to do on a 745 that wouldn't charge the battery. Figured it was worth a shot (plus it could be done after Christmas dinner at the kitchen table, out of the 30 degree weather -- with snow flurries -- in Savannah GA).

Bottom line is, it worked. Didn't see any obvious cracked connections with the magnifying glass, so I did them all.

A Christmas miracle. Hope you had as good a Holiday as I did.