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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

Intermittent Headlight

Postby Jellobmw » 08 Jul 2009, 21:26

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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Joined: 19 Nov 2008, 21:27
Location: Burlington, VT
Model and Year: 1998 V70R

Re: Intermittent Headlight

Postby drsugg » 09 Jul 2009, 05:18

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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Location: Eureka Ca.
Model and Year: 97 850

Re: Intermittent Headlight

Postby Jellobmw » 09 Jul 2009, 12:02

Can it be opened and repaired?
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Jellobmw
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Joined: 19 Nov 2008, 21:27
Location: Burlington, VT
Model and Year: 1998 V70R

Re: Intermittent Headlight

Postby drsugg » 09 Jul 2009, 13:29

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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Location: Eureka Ca.
Model and Year: 97 850


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