2006 model - highbeams not working, plus intermittent driver's low-beam shutting off
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    1. #1
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      Thumbs up 2006 model - highbeams not working, plus intermittent driver's low-beam shutting off

      Hello, me and my parent are working on a used 2006 XC70 we recently acquired, trying to get it into out-of-province inspection shape. The high beams are not turning on, despite the rotary switch on the LSM being in the correct position (12 o'clock) when the vehicle is powered up, the dashboard high beam indicator lighting up, and the low beam angle adjustment working properly. We have so far done the following in the process of troubleshooting:

      - replaced high beam bulbs, and checked that, despite wiring continuity, no voltage is sent to high beam sockets when activated
      - verified circuit continuity to the CEM from the headlights, and both the SWM and LSM
      - found circuit continuity between the SWM and LSM green/white wires (the colour listed in the wiring diagrams for high beam control), and confirmed both modules' power input wires are at 12V
      - replaced the CEM with a remanufactured and cloned one from Xemodex (they told us the original had no detectable problem either)
      - verified all other functions linked into the SWM (wipers, error message reading, steering wheel buttons) are working normally
      - cleaned contact pads inside of the stalk switch

      Despite all of this, the high beams still do not turn on. Our latest attempt is to get a brand new LSM and stalk switch, which we are waiting for. I was thinking it might also be a chip in the SWM, but I'm not sure whether the stalk switch circuits go into the SWM chips, or if they are just routed through the circuit board directly to the socket (after all, the SWM circuit board where the stalk plugs into it, and the output to CEM is green, while the rest of it is blue).

      On a related note, a couple times when I attempted to flash the high beams to test, or covered the dashboard daylight sensor, the driver's side low beam would begin to flicker on and off, and finally turn off, until I powered off the car and restarted, at which time it would be on again.

      Has anyone experienced a problem like this before? I will update when the LSM and stalk are replaced, but we'd like to get this thing over with as soon as possible, since we've already pumped $1000 extra bucks into it for effectively no reason. Also, does anyone know what the dash daylight sensor is officially called, and where we could buy a new one if needed?
      Last edited by quindersen; 06-06-2020 at 06:12 PM.

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    3. #2
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      Get a used headlight switch from evilbay or your local pick and pull

    4. #3
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      Quote Originally Posted by quindersen View Post
      The high beams are not turning on, despite the rotary switch on the LSM being in the correct position (12 o'clock) when the vehicle is powered up, the dashboard high beam indicator lighting up,

      - replaced high beam bulbs, and checked that, despite wiring continuity, no voltage is sent to high beam sockets when activated

      the high beams still do not turn on.
      First - stop replacing parts that you can't prove are bad, don't buy a daylight sensor or anything else - you can see it gets very expensive and frustrating.

      "Low beam angle adjustment" tells me this is not a USA car.

      What are the low beam headlamp bulbs (the outside ones)? Are they H7 or HIDs? H7s have two spade teminals that melt, the HID connector is round (or may have an ignitor attached to the end of the bulb on some cars)

      If they are H7s, the inner bulbs are the high beams. (and you said you had no power to the inner bulbs) VIDA and a wiring diagram that should be included with VIDA, (but not sure about the stolen/downloadable version including it) could help.

      If they are HID outer bulbs the inner bulbs are not used for main or dipped beam. For high beam the headlamps change the angle of the beam (with a motor) to throw the beam out further. In that case the inner bulbs might be only daytime running lamps. Those could be have been turned off in the CEM, there are 3 setting for daytime running lamps in VIDA are flexnoll, flexstd, and flex lgt.

      HID headlamp cars in the USA have a level sensor attached to the LF? suspension.

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    6. #4
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      The owner's manual says the low beams are H11s, but it also says the high beams are H9s, and those turned out to not fit in the sockets, and the auto parts store said we needed 9005's based on their database, which did fit (H10s were in the high beam sockets when we bought it). The hardware for HIDs/Xenons/etc. (ballasts/ignitors) isn't present either. The outer bulbs are what come on when the car is started, which I understood to be the low beams.

      The car is Canadian afaik, and we have some wiring diagrams from online that we are following trying to figure things out.

    7. #5
      Senior Member ScottishBrick's Avatar
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      Please post pics.


      Sent from my iPhone using Tapatalk
      2003 V70 T5 - Mystic/Graphite - M56LK - 206k - K24/Greens/Do88/Quaife/SMF/P2R Clutch/DW300C/H&R/Bilstein TC/316mm & 308mm Brakes - SteveO Tuned
      1999 V70 T5 - Pewter/R Graphite & Alcantara - AW42 - 299k - Daily/Work Wagon
      1999 V70 T5 - Nautic/R Graphite & Alcantara - M56H - 177k - Rescued
      1999 V70 T5 - Emerald/Graphite - M56H - 119k - Garage Queen
      2000 V70 T5 - Mystic/Graphite - AW42 - 243k - Moms Unicorn
      2000 S70 GLT SE- Mystic/Graphite - AW42 - 218k - Sisters

    8. #6
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      What should I post pictures of?

    9. #7
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      Quote Originally Posted by quindersen View Post
      The owner's manual says the low beams are H11s,
      Yes, the h11's are the low beam bulb in the plastic front headlamps (for non HID cars) and get a melted connection at the bulb, (possible for the erratic left bulb ) Volvo sells a reliable quality connector 31299732 for a fortune, aftermarket are much cheaper but melt again.

      Does the car actually have H11's for low beams? If so the high (main) beam inner bulbs are fused on the CEM, position 22 and 23.

      Is there a blue, a green, and a bl/green wire going to both headlamp connectors? (as well as 3 or 4 others) If so those are used for the HID system.

    10. #8
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      Quote Originally Posted by zak View Post
      Get a used headlight switch from evilbay or your local pick and pull
      this...
      2010 V70 3.2 125,000miles
      2002 V70XC, 175,000 miles
      2004 S60 2.5T, 160,000 miles

    11. #9
      Senior Member ScottishBrick's Avatar
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      Quote Originally Posted by quindersen View Post
      What should I post pictures of?
      The lights, harness ect. Im wondering if the car has the wrong light type
      2003 V70 T5 - Mystic/Graphite - M56LK - 206k - K24/Greens/Do88/Quaife/SMF/P2R Clutch/DW300C/H&R/Bilstein TC/316mm & 308mm Brakes - SteveO Tuned
      1999 V70 T5 - Pewter/R Graphite & Alcantara - AW42 - 299k - Daily/Work Wagon
      1999 V70 T5 - Nautic/R Graphite & Alcantara - M56H - 177k - Rescued
      1999 V70 T5 - Emerald/Graphite - M56H - 119k - Garage Queen
      2000 V70 T5 - Mystic/Graphite - AW42 - 243k - Moms Unicorn
      2000 S70 GLT SE- Mystic/Graphite - AW42 - 218k - Sisters

    12. #10
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      I can't tell if H11s are actually the bulb in there, as we would have to take out a bunch of large engine bay components, or the front bumper, to get into the low beam side of the headlight assembly. I can feel wires connected to the sockets inside, but I can only see that the wires are inside one of those black mesh tubes.

      All fuses related to headlights and the connected modules are good, including the 22/23 positions on the CEM. From what I can see of the low beam bulbs behind the deflector for adjusting the low beam angle, it seems to be similar in shape to the high beam 9005s/H10s

      Here's the best angle of the low beam light I could get with it still installed...

    13. #11
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      A few more images:

      From above, in engine bay, one passenger's side, one drivers



      And what I could get by shoving my phone between all the mess to look into the low beam compartment on the driver's side


    14. #12
      Senior Member ScottishBrick's Avatar
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      OK. So. Those are xenons. Your car does not have high beams as factory. The “high beam” is your DRL.


      Sent from my iPhone using Tapatalk
      2003 V70 T5 - Mystic/Graphite - M56LK - 206k - K24/Greens/Do88/Quaife/SMF/P2R Clutch/DW300C/H&R/Bilstein TC/316mm & 308mm Brakes - SteveO Tuned
      1999 V70 T5 - Pewter/R Graphite & Alcantara - AW42 - 299k - Daily/Work Wagon
      1999 V70 T5 - Nautic/R Graphite & Alcantara - M56H - 177k - Rescued
      1999 V70 T5 - Emerald/Graphite - M56H - 119k - Garage Queen
      2000 V70 T5 - Mystic/Graphite - AW42 - 243k - Moms Unicorn
      2000 S70 GLT SE- Mystic/Graphite - AW42 - 218k - Sisters

    15. #13
      Senior Member ScottishBrick's Avatar
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      The bulbs are D2R (low bucket) and 9005 as the running light.
      2003 V70 T5 - Mystic/Graphite - M56LK - 206k - K24/Greens/Do88/Quaife/SMF/P2R Clutch/DW300C/H&R/Bilstein TC/316mm & 308mm Brakes - SteveO Tuned
      1999 V70 T5 - Pewter/R Graphite & Alcantara - AW42 - 299k - Daily/Work Wagon
      1999 V70 T5 - Nautic/R Graphite & Alcantara - M56H - 177k - Rescued
      1999 V70 T5 - Emerald/Graphite - M56H - 119k - Garage Queen
      2000 V70 T5 - Mystic/Graphite - AW42 - 243k - Moms Unicorn
      2000 S70 GLT SE- Mystic/Graphite - AW42 - 218k - Sisters

    16. #14
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      Why would the fuses all be set up otherwise if that's the case? There's clearly different fusing for bi-xenons in the owner's manual, and different wiring in the diagrams. Maybe you are right, but these would be some pretty damn dim xenons...

      Also, what exactly gave it away to you, because I also have to convince my father working with me that that is the case...

      Edit: and also this means that my problem is now that the DRLs aren't working, can this only be fixed at a dealer?
      Last edited by quindersen; 06-03-2020 at 04:06 PM.

    17. #15
      Senior Member ScottishBrick's Avatar
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      xenon bulb. xenon igniter. xenon ballast to igniter shielded cable. Xenon ballast in the last pic.

      Post a pic of the light from a few feet back. The low beam bucket is more pronounced on xenon lights
      2003 V70 T5 - Mystic/Graphite - M56LK - 206k - K24/Greens/Do88/Quaife/SMF/P2R Clutch/DW300C/H&R/Bilstein TC/316mm & 308mm Brakes - SteveO Tuned
      1999 V70 T5 - Pewter/R Graphite & Alcantara - AW42 - 299k - Daily/Work Wagon
      1999 V70 T5 - Nautic/R Graphite & Alcantara - M56H - 177k - Rescued
      1999 V70 T5 - Emerald/Graphite - M56H - 119k - Garage Queen
      2000 V70 T5 - Mystic/Graphite - AW42 - 243k - Moms Unicorn
      2000 S70 GLT SE- Mystic/Graphite - AW42 - 218k - Sisters

    18. #16
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      Alright, I've also checked the owner's manual again, and indeed, all that hardware in the pictures isn't part of the standard low beams. Guess I really should have looked closer at them to begin with. Do you have any idea how the bulbs are still operating despite the fuses being in the halogen setup? All the fuses listed in the manual as Bi-xenons (option) are empty, except the one shared with power steering (edit for later people: I'm stupid and there isn't any dedicated bi-xenon fuses other than that one)...

      Here's the buckets plus a photo in DRL mode:

      Last edited by quindersen; 06-04-2020 at 12:50 PM.

    19. #17
      Senior Member ScottishBrick's Avatar
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      Yes those are 100% xenon.

      The xenon lights will plug in and work just fine with halogen harness and setup. I know because I have them on my factory halogen car as well.
      2003 V70 T5 - Mystic/Graphite - M56LK - 206k - K24/Greens/Do88/Quaife/SMF/P2R Clutch/DW300C/H&R/Bilstein TC/316mm & 308mm Brakes - SteveO Tuned
      1999 V70 T5 - Pewter/R Graphite & Alcantara - AW42 - 299k - Daily/Work Wagon
      1999 V70 T5 - Nautic/R Graphite & Alcantara - M56H - 177k - Rescued
      1999 V70 T5 - Emerald/Graphite - M56H - 119k - Garage Queen
      2000 V70 T5 - Mystic/Graphite - AW42 - 243k - Moms Unicorn
      2000 S70 GLT SE- Mystic/Graphite - AW42 - 218k - Sisters

    20. #18
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      Alright, something weird just happened, me and my brother were fooling around with a few things, we somehow blew the #9 fuse on the side-of-dash fuse box (we heard a fuse snap and everything on the SWM wasn't working), we replaced it, and voila, the inside DRLs were working now. No idea why, because we checked that fuse was good before. The issue of the driver's side xenon shutting off intermittently after flashing the high beams is still there though...

      Thoughts?

    21. #19
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      Quote Originally Posted by quindersen View Post
      Alright, something weird just happened, me and my brother were fooling around with a few things, we somehow blew the #9 fuse on the side-of-dash fuse box (we heard a fuse snap and everything on the SWM wasn't working), we replaced it, and voila, the inside DRLs were working now. No idea why, because we checked that fuse was good before. The issue of the driver's side xenon shutting off intermittently after flashing the high beams is still there though...

      Thoughts?
      Harness is loose.


      Sent from my iPhone using Tapatalk
      2003 V70 T5 - Mystic/Graphite - M56LK - 206k - K24/Greens/Do88/Quaife/SMF/P2R Clutch/DW300C/H&R/Bilstein TC/316mm & 308mm Brakes - SteveO Tuned
      1999 V70 T5 - Pewter/R Graphite & Alcantara - AW42 - 299k - Daily/Work Wagon
      1999 V70 T5 - Nautic/R Graphite & Alcantara - M56H - 177k - Rescued
      1999 V70 T5 - Emerald/Graphite - M56H - 119k - Garage Queen
      2000 V70 T5 - Mystic/Graphite - AW42 - 243k - Moms Unicorn
      2000 S70 GLT SE- Mystic/Graphite - AW42 - 218k - Sisters

    22. #20
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      Quote Originally Posted by quindersen View Post
      The issue of the driver's side xenon shutting off intermittently after flashing the high beams is still there though...

      Thoughts?
      Poor connection at the bulb - the bulb moves up and down going from low to high beam - so the wires are wiggled at the bulb - Yes we all know it's difficult to get to, move the air filter box out of the way to be able to get to the back of the bulb and be glad it's not the right side!

    23. #21
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      Alright, I'll start working with my father on getting in there and report back on whether it was successful or not. Thanks for the help!

    24. #22
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      I figured I'd post this short video just so you can see the pattern of shutting off that happens after flashing. My comment at the end about "until I turn it back on" is either restarting the car or cycling the rotary switch to the 9 o'clock back to the 12 o'clock position. This video was taken after I disconnected and reconnected the end of the harness I'm holding in picture 2/5 a few posts up.

      https://youtu.be/hSajxERuQQ4

    25. #23
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      Alright, we disconnected the harnesses and took out the bulb/igniter, and then took apart the igniter and found that a previous owner had broken one of the plastic retention grooves for the bulb's pins in the igniter. Luckily there was still two good ones across from another and now the bulb seems to be staying on during flashing. Something to remember when changing the bulbs next time I suppose. Thanks for all the help!


      On one final note, we broke a plastic part looking around the headlight assembly, below are pictures. Anyone know what it is and if it's critical to replace?


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