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Ray 911s Ray 911s is offline
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Join Date: May 2002
Location: Wisconsin
Posts: 739
I have the same problem but on the right side. I checked the bulb on a regulated power supply - both high and low are functional. I also swapped the bulbs left to right. The problem stayed on the right side. Used a multimeter to check the leads. There is no power to the low beam wire on the right side. High beams are fine.

I have just installed the JWest relay system and nothing changed. Fuses in all four locations are good.

Reviewing the wiring diagram didn’t help - I am wondering if there is something in either the stalk or in the gauge lighting circuit that can impact the low beam. I can’t read the current path diagram well enough to know which terminals on the switches should have feed power. Getting ready to remove the stalk and the headlight switch to test all functions for shorts or dead spots.

In the meantime I lowered the headlight aim and drive with the high beams
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1977 911S
1973 Alfa Romeo GT Veloce
1997 Lotus Turbo Esprit V8
2016 AMG C63S
Old 08-12-2019, 09:53 AM
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