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Intermittent Headlight

Help, Advice, Owners' Discussion and DIY Tutorials on S40 and V40. In this forum you'll find S40/V40-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
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Jellobmw
Posts: 37
Joined: Wed Nov 19, 2008 2:27 pm
Year and Model: 1998 V70R
Location: Burlington, VT

Intermittent Headlight

Post by Jellobmw » Wed Jul 08, 2009 3:26 pm

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?

drsugg
Posts: 59
Joined: Sat May 03, 2008 8:29 pm
Year and Model: 97 850
Location: Eureka Ca.

Re: Intermittent Headlight

Post by drsugg » Wed Jul 08, 2009 11:18 pm

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.

Jellobmw
Posts: 37
Joined: Wed Nov 19, 2008 2:27 pm
Year and Model: 1998 V70R
Location: Burlington, VT

Re: Intermittent Headlight

Post by Jellobmw » Thu Jul 09, 2009 6:02 am

Can it be opened and repaired?

drsugg
Posts: 59
Joined: Sat May 03, 2008 8:29 pm
Year and Model: 97 850
Location: Eureka Ca.

Re: Intermittent Headlight

Post by drsugg » Thu Jul 09, 2009 7:29 am

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.

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