XJS ( X27 ) 1975 - 1996 3.6 4.0 5.3 6.0

Low beam headlight not working

 
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Old 05-01-2019, 04:04 PM
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Default Low beam headlight not working

Greetings,
Discovered the left side low beam headlight does not light up. However, when I switch to high beam all 4 lights are on. What!! Anyway, I checked the fuses. All are good. So any tips about what to test next are welcome.

ok, this is on my 1990 XJS V12 Convertible.
 
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Old 05-01-2019, 04:20 PM
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It has to be one of the following.

- Fuse 4 in the black fuse panel in the engine bay
- Connectors on fuse 4 or to the low beam lamp
- Faulty low beam lamp.

According to the electrical guide there are 2 bulbs one is high beam only and the other dual high/low beam when high beam is on low is off what you are seeing is the high beam part of the dual bulb.
 
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Old 05-01-2019, 06:43 PM
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The low beam bulb has two filaments. I believe that the low beam filament is burned out. Try replacing the bulb.
 
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Old 05-01-2019, 06:57 PM
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Thanks. I’ll test the bulb itself.
 
 
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