S60 - Headlight not working

McGandalf · Feb 15th, 2019, 21:10

My offside (driver’s side) headlight unit has just stopped working. Sidelight, dipped beam and main beam are not switching on. Front OS fog light and indicator works ok.

When I switch the engine off and restart (I’ve tested this once), the front OS sidelight came on and switched itself off 20-30 seconds later. Front OS dipped beam did not light up at all.

Message on the dash says “dipped beam failure”.

Car is an early 2005 S60 D5 Euro3 163bhp - D5244T engine.

Dipped bulbs are new-ish - replaced about 6 months/4000 miles ago. No idea how old the sidelight bulbs are.

CEM problems? Loose wire? Something as simple as a fuse?

McGandalf · Feb 15th, 2019, 21:11

To clarify, the entire nearside (passenger side) headlight unit lights up perfectly - all bulbs working.

ASt85 · Feb 16th, 2019, 07:53

This can be caused by a faulty head lamp CEM shunt
go to this link post number 20 - it worked for me.

https://www.volvoforums.org.uk/showt...?t=9910&page=2

petey · Feb 16th, 2019, 09:43

It can also be caused by a failed earth...

You might be lucky and jump straight to the fault, but I would first measure the voltage across a ‘failed’ lamp positive and earth and then the resistance between the earth wire and a good earth. That will tell you huge amounts as to what’s wrong.

McGandalf · Feb 16th, 2019, 12:32

Quote:

Originally Posted by petey

I would first measure the voltage across a ‘failed’ lamp positive and earth and then the resistance between the earth wire and a good earth.

Thanks. For want of a silly question, how might I go about doing this with a multimeter?

pierremcalpine · Feb 16th, 2019, 20:26

ignore I though you had an earlier style v40

petey · Feb 18th, 2019, 01:11

Quote:

Originally Posted by McGandalf

Thanks. For want of a silly question, how might I go about doing this with a multimeter?

Absolutely yes, with a multimeter set on 0-20V DC and then on resistance...

Feb 15th, 2019, 21:10	#1
McGandalf Member Last Online: Feb 1st, 2022 10:11 Join Date: Mar 2015 Location: Hampshire	S60 - Headlight not working My offside (driver’s side) headlight unit has just stopped working. Sidelight, dipped beam and main beam are not switching on. Front OS fog light and indicator works ok. When I switch the engine off and restart (I’ve tested this once), the front OS sidelight came on and switched itself off 20-30 seconds later. Front OS dipped beam did not light up at all. Message on the dash says “dipped beam failure”. Car is an early 2005 S60 D5 Euro3 163bhp - D5244T engine. Dipped bulbs are new-ish - replaced about 6 months/4000 miles ago. No idea how old the sidelight bulbs are. CEM problems? Loose wire? Something as simple as a fuse? Last edited by McGandalf; Feb 15th, 2019 at 21:12. Reason: Typo

Feb 16th, 2019, 07:53	#3
ASt85 Premier Member Last Online: Today 14:11 Join Date: Aug 2010 Location: Walderslade....Kent	This can be caused by a faulty head lamp CEM shunt go to this link post number 20 - it worked for me. https://www.volvoforums.org.uk/showt...?t=9910&page=2 __________________ The saddest moment is when the one who gave you the best memories....becomes a MEMORY V70 SE 2004 2.3L T5 Geartronic, C70 2005 2.0T Automatic, Sold 2.4l 20 Valve Automatic Torslander Sold 854 GLT 20v Auto

Feb 16th, 2019, 20:26	#6
pierremcalpine Premier Member Last Online: Jan 3rd, 2024 14:43 Join Date: Feb 2012 Location: Toronto Canada	ignore I though you had an earlier style v40 __________________ 2003 V40 1.9T B4204T4, 197,000miles (sold but alive!), 2004 S60 2.5T, 160,000miles, 2010 V70 3.2, 125,000miles, 2002 V70XC 2.4, 175,000miles Click here for my x40 and V70 P3 repair guides

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Feb 15th, 2019, 21:11	#2
McGandalf Member Last Online: Feb 1st, 2022 10:11 Join Date: Mar 2015 Location: Hampshire	To clarify, the entire nearside (passenger side) headlight unit lights up perfectly - all bulbs working.

Feb 16th, 2019, 09:43	#4
petey Master Member Last Online: Sep 11th, 2023 13:10 Join Date: May 2009 Location: Chippenham	It can also be caused by a failed earth... You might be lucky and jump straight to the fault, but I would first measure the voltage across a ‘failed’ lamp positive and earth and then the resistance between the earth wire and a good earth. That will tell you huge amounts as to what’s wrong.

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