Author Topic: Non-functional brake light  (Read 774 times)

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  • Offline randerson22   us

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    Offline randerson22

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    Non-functional brake light
    on: June 01, 2022, 07:43:21 pm
    June 01, 2022, 07:43:21 pm
    Hi, I have a 2017 with about 13,000 miles.  Rear tail light is functioning fine, but both front and rear brake use does not activate the brake light.  Very dangerous, clearly.  The dealer says, since it's LED, you don't just have a brake light bulb you can replace.  Rather, you have to replace the entire rear taillight cluster.  He also said he's never seen this before. 

    So, I can only imagine the price of a new cluster.  Any electrically savvy people have any ideas on this?  I didn't see a fuse in there marked "brake lights".  I did break a fuse for the auxiliary power jacks, which I am replacing today. I'll see if somehow that fuse might have been involved, but I doubt it.  Any ideas greatly appreciated.

  • Offline Paul_Smith   ie

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    Offline Paul_Smith

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    Re: Non-functional brake light
    Reply #1 on: June 02, 2022, 12:54:00 am
    June 02, 2022, 12:54:00 am
    At 190, it is less then I thought it would be https://www.bike-parts-ducati.com/ducati-motorcycle/Multistrada/2017/Multistrada_950/Multistrada-950/NUMBER-PLATE-HOLDER--TAIL-LIGHT/299/4/0/299
    But I really doubt if all the brake LEDS and none of the other LEDS have blown at the same time. Much more likely is that what ever caused one fuse to blow has interrupted the braking signal. How did that fuse blow and have you checked all the others?   

  • Offline Teaboy   gb

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    Offline Teaboy

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    Re: Non-functional brake light
    Reply #2 on: June 02, 2022, 07:39:32 am
    June 02, 2022, 07:39:32 am
    Have you tried putting a direct 12v feed to the brake light will tell you instantly if fault is in the wiring or if the led had failed

  • Offline Paul_Smith   ie

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    Offline Paul_Smith

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    Re: Non-functional brake light
    Reply #3 on: June 02, 2022, 12:32:04 pm
    June 02, 2022, 12:32:04 pm
     :460:

  • Offline hawaiianbrian   th

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    Offline hawaiianbrian

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    Re: Non-functional brake light
    Reply #4 on: June 03, 2022, 01:01:25 pm
    June 03, 2022, 01:01:25 pm
    I have also had this issue twice with a 2017 as well. I took it to the dealer and they told me both times it was a fuse issue if that helps you.

  • Offline randerson22   us

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    • #5

    Offline randerson22

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    Re: Non-functional brake light
    Reply #5 on: June 06, 2022, 06:59:43 pm
    June 06, 2022, 06:59:43 pm
    OK, well I feel like an idiot, but I changed the fuse that broke that is labeled "ASSY", and lo and behold, both brake lights now work!  A $.50 solution on an Italian bike, WOOHOOOOO!!!  I tried to find schematics showing what functions each fuse handled, but quickly went blind trying to read them. 

    In any case, super stoked about this, and I hope this might help others in the future.

  • Offline Canmulti   ca

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    Offline Canmulti

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    Re: Non-functional brake light
    Reply #6 on: June 20, 2022, 05:40:08 am
    June 20, 2022, 05:40:08 am
    I'm new to this chat room but had the same problem. Brake light quit working on a 6600km trip. Just read the blog and replaced the same fuse which was blown and Voila! Had it into a Ducati dealer on the trip and after 2 hrs couldn't fix it.
    What I wonder though is why the fuse blew. I did have a phone charger plugged into the dash accessory outlet but don't see how that would blow a 10A fuse. The brake light is working now but time will tell.

  • Offline zetaetatheta   us

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    Offline zetaetatheta

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    Re: Non-functional brake light
    Reply #7 on: June 20, 2022, 05:19:28 pm
    June 20, 2022, 05:19:28 pm
    "What I wonder though is why the fuse blew." What I would wonder is why a Ducati tech couldn't find a blown fuse after 2hrs, great anecdote for DIY'ers.

  • Offline Canmulti   ca

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    Offline Canmulti

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    Re: Non-functional brake light
    Reply #8 on: June 21, 2022, 03:21:49 am
    June 21, 2022, 03:21:49 am
    I don't understand why the accessory ports and the brake light are on the same fuse.? If you overload the accessory port you lose your brake light? Doesn't seem to make sense to me.

     



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