2016 SHO passenger side xenon headlight not working.

Discussion in 'Generation 4 - Maintenance & Troubleshooting' started by Joe_Cool, Nov 20, 2020.

  1. Joe_Cool

    Joe_Cool SHO Member

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    I replaced the osram 66340 lamp, and verified that fuse #78 in the power distribution box under the hood is good.

    What's my next step, and how expensive (and/or labor intensive) is it going to be?
     
  2. Johnbigdog

    Johnbigdog SHO Member

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    Swap the headlights left and right. The conector is the same pilot on both side.

    If the lamp is still inoperative, swap the module bolted to the bottom.

    This will tell you if you have a circuit, headlamp or module fault.
     
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  3. Johnbigdog

    Johnbigdog SHO Member

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    At the headlamp conector the blue green is the signal wire to turn on the headlamp. The brown red is 12v constant power. Black grey is ground.
     
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  4. Johnbigdog

    Johnbigdog SHO Member

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    Your going to have to pull the bumper cover to swap the modules attached to the headlight.
     
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  5. Joe_Cool

    Joe_Cool SHO Member

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    I DISLIKE THIS


    :rofl: Thanks for the info.
     
  6. Joe_Cool

    Joe_Cool SHO Member

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    Am I going to have to pull the entire headlight assembly, or just the bumper cover?
     
  7. bpd1151

    bpd1151 Lurking Around

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    Once the bumper cover's been removed, you'll have to remove the entire headlight assembly.

    I have a "How-To" write up on the front bumper cover removal. Authored many years ago. Check the "How-To" section(s). I can link you to it if need be. Just LMK.

    As far as the assembly itself, one bolt up top on the horizontal side of the assembly. One bolt below, at the face/front vertical side of the assembly. Then there's a guide pin on the farthest outer edge of the assembly.

    Once the two bolts have been removed, you'll have to give it a gentle tug to dislodge it out of/from the guide pin area.

    Good luck![​IMG][​IMG][​IMG]

    Sent from my SM-N950U using Tapatalk
     
  8. bpd1151

    bpd1151 Lurking Around

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  9. Joe_Cool

    Joe_Cool SHO Member

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    I never cease to be amazed at the amount of knowledge that's on this forum. :hail:
     
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  10. bpd1151

    bpd1151 Lurking Around

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    Agreed!

    I will add that we all "stick together" because it is very much a niche car/niche market, so it's important that we each contribute as we can.

    Sent from my SM-N950U using Tapatalk
     
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  11. Joe_Cool

    Joe_Cool SHO Member

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    Well, that went much better than expected. All done in a little over an hour.



    EXCEPT...

    Now it won't turn off. The only way I can shut it off is to pull the fuse. So it's just as good as not having it. *sigh*
     
  12. Joe_Cool

    Joe_Cool SHO Member

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    Well, I just took it apart again to make sure I hooked up everything properly, and I'm now confident that I did.

    Now that I had it apart again, I tested this. 12v+ is constant, and 12v+ switched goes on and off with the headlight switch.

    So I guess I replace the entire assembly along with the electronics inside it, now that I know the external wiring is working and it has a new ballast? Figures it'd end up being the most expensive part.
     
    Last edited: Nov 22, 2020 at 2:17 PM
  13. Johnbigdog

    Johnbigdog SHO Member

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    If you swapped the modules bolted to the bottom of the lamp then swapped them back. Yep you got the expensive part.
     

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