No passenger low beam - fuse & bulb fine

Antoin · Feb 27th, 2022, 20:16

Bit of a strange one....
Had the passenger low beam blow this morning. Nothing unusual about that, changed the bulb and no Bueno. Tried another known good bulb and still no joy.
Checked fuses and all good.

Left it at that, stuck a known good bulb in it and parked the car up....but when starting the car the passenger low beam will light for a fraction of a second so it is definitely getting power for a bit.

Is the "brain" shutting it off for some reason? Does the lighting on the xc90 have it's own separate module?

Thanks,
Anton

Simmy · Feb 27th, 2022, 21:58

check the multi pin connector on the cem

Antoin · Feb 28th, 2022, 05:19

Quote:

Originally Posted by Simmy

check the multi pin connector on the cem

What exactly should I be looking for ?

Familyman 90 · Feb 28th, 2022, 06:24

You don't state the year or spec, but of applicable first try swapping the ballast from one headlamp to another and see if the problem stays or swaps sides.

Antoin · Feb 28th, 2022, 11:46

Quote:

Originally Posted by Familyman 90

You don't state the year or spec, but of applicable first try swapping the ballast from one headlamp to another and see if the problem stays or swaps sides.

My apologies gents, specs would be helpful...

It is a 2004 XC90 d5.
Halogen headlamps so no ballasts.
Replacement bulbs are confirmed good and fuses are all intact.

SwissXC90 · Feb 28th, 2022, 11:53

Quote:

Originally Posted by Antoin

My apologies gents, specs would be helpful...

It is a 2004 XC90 d5.
Halogen headlamps so no ballasts.
Replacement bulbs are confirmed good and fuses are all intact.

Likely bad relay in CEM, easy to replace in that year XC90. the relays are plugged in.

Simmy · Feb 28th, 2022, 13:06

it depends on which cem is fitted the removeable shunts are only on the early cars latter ones are on the inside of the cem which require specialist repair . try the connector first is a free option

Simmy · Feb 28th, 2022, 13:12

Quote:

Originally Posted by Antoin

What exactly should I be looking for ?

either of the 2 large multi pin connectors which plug into the cem or try swaping the headlight shunts if your car has them . you will need to find out which type your car has or take it to a good independant volvo garage this problem also occurs on v70 and s60 cars its quite common

Simmy · Feb 28th, 2022, 13:50

there are videos on cems by a company called xemodx to learn about the different types on you tube

Antoin · Feb 28th, 2022, 16:26

Thank you gents that gives me a few things to try

Feb 27th, 2022, 20:16	#1
Antoin New Member Last Online: Jun 1st, 2024 13:34 Join Date: Aug 2020 Location: Portstewart	No passenger low beam - fuse & bulb fine Bit of a strange one.... Had the passenger low beam blow this morning. Nothing unusual about that, changed the bulb and no Bueno. Tried another known good bulb and still no joy. Checked fuses and all good. Left it at that, stuck a known good bulb in it and parked the car up....but when starting the car the passenger low beam will light for a fraction of a second so it is definitely getting power for a bit. Is the "brain" shutting it off for some reason? Does the lighting on the xc90 have it's own separate module? Thanks, Anton

Feb 28th, 2022, 06:24	#4
Familyman 90 The Brit Brick Last Online: Aug 13th, 2023 09:39 Join Date: Jul 2021 Location: Warwickshire	You don't state the year or spec, but of applicable first try swapping the ballast from one headlamp to another and see if the problem stays or swaps sides. __________________ *2005 C70 2.4T Collection convertible. 40,000 mile sunny day toy.* Last edited by Familyman 90; Feb 28th, 2022 at 06:26.

Feb 27th, 2022, 21:58	#2
Simmy Premier Member Last Online: Yesterday 22:51 Join Date: Mar 2017 Location: Manchester	check the multi pin connector on the cem

Feb 28th, 2022, 13:06	#7
Simmy Premier Member Last Online: Yesterday 22:51 Join Date: Mar 2017 Location: Manchester	it depends on which cem is fitted the removeable shunts are only on the early cars latter ones are on the inside of the cem which require specialist repair . try the connector first is a free option

Feb 28th, 2022, 13:50	#9
Simmy Premier Member Last Online: Yesterday 22:51 Join Date: Mar 2017 Location: Manchester	there are videos on cems by a company called xemodx to learn about the different types on you tube

Feb 28th, 2022, 16:26	#10
Antoin New Member Last Online: Jun 1st, 2024 13:34 Join Date: Aug 2020 Location: Portstewart	Thank you gents that gives me a few things to try

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