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    Intermittent Headlight

    Help and Advice on S40, V40 and V50. In this forum you'll find S40/V40/V50-specific owners asking and answering questions on maintenance, ownership, repairs, tutorials and almost every do-it-yourself thing you can do to save money owning these Volvos.
    1996 - 2004 S40
    1996 - 2004 V40
    2004 - 2004 V50
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    Intermittent Headlight

    Postby Jellobmw » 08 Jul 2009, 22:26

    Its a 2000 S40, and the left low beam headlight is intermittent. After turning the light it may go on, and after going over a bump it may go off, or on.....

    Its not the bulb, and the dealer has checked the connector.

    Anyone else ever have this problem, and know where the problem lies?
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    Jellobmw
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    Posts: 32
    Joined: 19 Nov 2008, 22:27
    Location: Burlington, VT
    Model, Year: 1998 V70R
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    Re: Intermittent Headlight

    Postby drsugg » 09 Jul 2009, 06:18

    It is probably the lamp control module. It's the big control unit under the left side dash. They incorporate all the high/low and power relays for the exterior lamps in a single black box on the 40 series. Big bucks to replace.
    drsugg
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    Posts: 59
    Joined: 04 May 2008, 03:29
    Location: Eureka Ca.
    Model, Year: 97 850
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    Re: Intermittent Headlight

    Postby Jellobmw » 09 Jul 2009, 13:02

    Can it be opened and repaired?
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    Jellobmw
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    Posts: 32
    Joined: 19 Nov 2008, 22:27
    Location: Burlington, VT
    Model, Year: 1998 V70R
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    Re: Intermittent Headlight

    Postby drsugg » 09 Jul 2009, 14:29

    The box opens easy enough. Inside is a single circuit board chuck full of electronics and a few relays. I think it could be repaired by someone with experience with circuit board repair.The relays themselves look to be pretty generic and I was able to trace it down to one.
    drsugg
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    Posts: 59
    Joined: 04 May 2008, 03:29
    Location: Eureka Ca.
    Model, Year: 97 850
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