...after scanning the day's well-intended posts—IMO, you don't have a problem with Fuses—as long as the parking & tail lights work. (The only fused lights).

Or the Light Switch—as long as Highs can be switch-controlled (not just by the stalk/flasher).

Or the Headlight Relay—as long as Highs can be switch-controlled.

Or the Hi/Lo relay on the fender rail—as long as the Highs can be dropped by the flasher .

The ONLY thing I see that can affect only the Low Beams is the path from the Hi/Lo relay Terminal 56b (Gray wire) to the Bulb Failure Sensor terminal 6 ( 56b), the Sensor plug contact, or the Sensor itself.


--
Bruce Young,
'93 940-NA (current)
'80 GLE V8 (Sold 5/03)
'83 Turbo 245
'76 244 (lasted only 255,000 miles)
73 142 (98K)
'71 144 (track modified--crusher bound)
New 144 from '67 to '78
Used '62 122 from '63 to '67