Amazon Black Friday deals
IPD sale XeMODeX - Experts in Volvo Electronics

Get email notification of topic replies. Log in or register (free). Amazon Link Buy anything with this and it helps MVS!

Headlight Switch Module Not Working, DIM is dark, and radio is dark. Why? Help! Topic is solved

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
2004 - 2007 V70 R
2001 - 2007 XC-70
2001 - 2009 S60
2003 - 2007 S60 R

JohnnyBee323
Posts: 28
Joined: Tue Mar 13, 2018 1:03 pm
Year and Model: 2004 S60 2.5 T FWD
Location: CT

Headlight Switch Module Not Working, DIM is dark, and radio is dark. Why? Help!

Post by JohnnyBee323 »

Hi all,

I am new to this forum. I recently purchased a 2004 Volvo S60 2.5T FWD from a friend. One morning I stopped at the gas station, and when I went to turn on the car the Driver Information Module on the dash had gone dark (barely readable), the radio display had gone dark, and I more recently noticed the headlight switch module is not working.

Can someone please help me understand how I could fix this? Is it is as simple as a replacing the headlight switch module?

Please note, the DIM seems to still be working, its just very very dim. My high beams and low beams still work just fine, and the radio works too although I can't see which station its on. I did notice that when I hit the fuel latch unlock button on the headlight switch module, notifies me on the dim (from what I can see). This leads me to believe that the source of the problem is with the headlight switch module, and it might just need replacement.

Thank you in advance for the help!
ljsommar
Posts: 33
Joined: Sat Jun 18, 2011 10:40 am
Year and Model: v70 2002
Location: southeastern pa
Been thanked: 2 times

Re: Headlight Switch Module Not Working, DIM is dark, and radio is dark. Why? Help!

Post by ljsommar »

I was experiencing very similar if not identical symptoms and replacing the headlight assembly with a used one off ebay did resolve things. Very easy to replace 5 minutes or less.
Good luck
User avatar
oragex
Posts: 5116
Joined: Fri May 24, 2013 6:20 am
Year and Model: S60 2003
Location: Canada
Has thanked: 100 times
Been thanked: 309 times
Contact:

Re: Headlight Switch Module Not Working, DIM is dark, and radio is dark. Why? Help!

Post by oragex »

I think the above comment means replacing the switch module? Mine also makes truoubles. Not sure how easy to replace as it sits quite firmly in place.
ljsommar
Posts: 33
Joined: Sat Jun 18, 2011 10:40 am
Year and Model: v70 2002
Location: southeastern pa
Been thanked: 2 times

Re: Headlight Switch Module Not Working, DIM is dark, and radio is dark. Why? Help!  Topic is solved

Post by ljsommar »

Yes, I meant the switch module. Sorry for the mistake. To replace: open the door, pop the fuse panel access cover, push out the switch module, disconnect the connector. Doesn't get much easier.
Daveliz99
Posts: 59
Joined: Sun Aug 02, 2015 5:36 pm
Year and Model: V70 2001
Location: Alabama
Has thanked: 3 times
Been thanked: 2 times

Re: Headlight Switch Module Not Working, DIM is dark, and radio is dark. Why? Help!

Post by Daveliz99 »

I have the same problem on my 2001 V70 2.4T.

I looked through the junkyard the other day but the only ones they had have the gas tank button on the left. On my car, that button isn't there. It just has the fog light button and where the gas door button is, it's just blank.

Will it still work?
User avatar
abscate
MVS Moderator
Posts: 23228
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 414 times
Been thanked: 1271 times

Re: Headlight Switch Module Not Working, DIM is dark, and radio is dark. Why? Help!

Post by abscate »

Does your gas flap lock? Maybe it’s integrated into central Locking? If that’s so, the module should work with the extra button just bring dormant
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary
User avatar
mrbrian200
Posts: 1552
Joined: Wed Jan 20, 2016 8:47 am
Year and Model: 2006 S60 2.5T FWD
Location: Northern Indiana/Chicago
Has thanked: 7 times
Been thanked: 80 times

Re: Headlight Switch Module Not Working, DIM is dark, and radio is dark. Why? Help!

Post by mrbrian200 »

The gas flap locks automatically when you put the car in drive and reach a certain speed around 3 or 5 mph. If you unlock the flap, then lock the doors, the flap automatically relocks after a timer. Don't know how long the timer is but it's more than 5 minutes. The REM controls the flap locking mechanism motor by reversing polarity DC through 2 wires. The button on the light switch module communicates to tell the REM to unlock the flap via CAN data. The REM is responsible for relocking it (software).

The dimmer functions are controlled by CANBUS data generated at the light switch module based on the position of the thumb wheel. As other functions of the LSM are still working it's probably the analog pot on the thumb wheel that failed. But note: all dimmed lights are controlled via CAN data. The LSM is not hardwired to power any of these instrumentation lamps directly. I explain this so that you understand that there is not a wire you can simply bypass the LSM to connect +12v to light up these instrumentation lamps. You have to replace the light switch module.

The light switch module is considered plug and play: if it has the same buttons in the same places as the one on your car it should work, in your case it must come from a S60 2001-2009 or a V70 2001-2007.
User avatar
abscate
MVS Moderator
Posts: 23228
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 414 times
Been thanked: 1271 times

Re: Headlight Switch Module Not Working, DIM is dark, and radio is dark. Why? Help!

Post by abscate »

Volvo parts lisle shows that the lower two buttons pop out so a junkyard or PnP part should adapt

http://volvopartslisle.com/part/OEM-Vol ... ght-Switch
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary
User avatar
mrbrian200
Posts: 1552
Joined: Wed Jan 20, 2016 8:47 am
Year and Model: 2006 S60 2.5T FWD
Location: Northern Indiana/Chicago
Has thanked: 7 times
Been thanked: 80 times

Re: Headlight Switch Module Not Working, DIM is dark, and radio is dark. Why? Help!

Post by mrbrian200 »

abscate wrote: Wed Mar 21, 2018 4:06 am Volvo parts lisle shows that the lower two buttons pop out so a junkyard or PnP part should adapt

http://volvopartslisle.com/part/OEM-Vol ... ght-Switch
That makes life easy. Pull any S60/V70 LSM from salvage, switch the lower buttons if they're not the same.
Daveliz99
Posts: 59
Joined: Sun Aug 02, 2015 5:36 pm
Year and Model: V70 2001
Location: Alabama
Has thanked: 3 times
Been thanked: 2 times

Re: Headlight Switch Module Not Working, DIM is dark, and radio is dark. Why? Help!

Post by Daveliz99 »

Yes that does make life easy. I'll try it asap.

Just to clarify, my thumbwheel nor any other part of my lsm works. Most of my dash lights went dim, radio display out, bright headlights won't stay on etc. Other people who posted similar symptoms said they had some success by changing the lsm.

Thank you both for the help.
Post Reply
  • Similar Topics
    Replies
    Views
    Last post