Volvo RWD 444-544 Forum

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Blown headlights 444-544

Why do I keep blowing the same headlight?

Kevin
'56 444








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    Blown headlights 444-544

    Aw, c'mon!

    LIGHTING BY LUCAS - PRINCE OF DARKNESS!

    Seriously, though, are you using 6V or 12V headlights? Incandescent, Halogen, or Xenon Gas?

    I had old 12V incandescents in my '64 PV544, and I couldn't make out the road in front of me in the DAYTIME!

    To fix this, I went through the wiring, repairing the LUCAS riveted connections by cleaning and soldering them, checked the resistance to make sure the circuits were up to par, than replaced the headlights with new glass units that accept interchangeable bulbs.

    I have my new 7000º Kelvin Xenon bulbs on their way in the mail, so I should be able to see a ways down the road.

    I really like the Xenon lights because 1.) they give much more light in the daylight spectrum than yellow halogens, and 2.) they use less power to give more light. 55w/80w vs 85w/100w.

    Also, some great Rally-style driving lights mounted on stalks behind the front bumper guards help with the long-distance vision out here in the desert!

    Anyone want to see a picture? I can take some....

    Steve

    PS: You have a bad ground in the headlight circuit. Get a multitester and track it down.

    S.








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    Blown headlights 444-544

    I would check ALL the electrical connections to them and also the mounting.
    If the mounting is loose the excessive vibration will fatigue the filament
    worse than the other one.
    --
    George Downs, Bartlesville, Oklahoma, Central US








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      Blown headlights 444-544

      I'm with George on the vibration possibility.. could be at the light mounting place, or perhaps even bad fender mount causing it to shake excessivily

      -Matt
      --
      -Matt '70 145s, '65 1800s, '66 122s wagon, others inc. '53 XK120 FHC








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    Blown headlights 444-544

    Check the ground on both headlights, the applied voltage should be the same so I would look for a poor ground causing voltage changes.
    Dennis








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      Blown headlights 444-544

      Another possibility might be -in case you use different makes of bulbs- you have got some bulbs of a relatively unknown manufacturer and inferior quality. At least it appeared to be the resaon I once had to replace the bulb of the same lamp four times in two months...







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