Jump to content

Left/Right turn signal indicator failure

Johnny21750

By Johnny21750
in Troubleshooting & Recalls

 Share

Recommended Posts

Johnny21750 New Member

Johnny21750

Posted
Posted

I have a 2014 gmc Sierra and I have left and right turn signal indicator failure. All bulbs are fine and everything works great but I keep getting this message. They will start out blinking normally then a few seconds they flash really fast and this message is displayed but all bulbs are fine. So I hooked my scanner to it and the code that keeps coming up is HVAC controls U1509-00 LIN BUS 9- Malfunction. This has been going on for months and I cannot figure out what’s wrong. I checked all bulbs, fuses and wires. All is fine. Any ideas? 

3496C402-482F-4A1E-AC98-4CBA74185963.jpeg

42A9BBFB-0499-4C96-BA32-FFE00F19F654.jpeg

A4F86EC1-438D-4CE8-B750-0033B7375318.jpeg

  • Replies 30
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

O_J_Simpson
O_J_Simpson

Replace the bulbs.

crankman
crankman

This had the same thing when my lamps were bad in taillight flasher blinked real fast it was bad lamps

Jakehead80
Jakehead80

I just had this issue went crazy for three days checking and replacing parts. Ended up the low beam headlight bulb was blown. Cleared it right up. Hope this helps someone else 

Posted Images

pgamboa Senior Enthusiast

pgamboa

Posted
Posted

Are you the first owner of this truck? Are the tail lights factory tails? Did you install LED bulbs? Did you install LED tail lights?


Sent from my iPhone using Tapatalk

BluEyeItln Enthusiast

BluEyeItln

Posted
Posted
On 9/28/2019 at 6:38 PM, Johnny21750 said:

I have a 2014 gmc Sierra and I have left and right turn signal indicator failure. All bulbs are fine and everything works great but I keep getting this message. They will start out blinking normally then a few seconds they flash really fast and this message is displayed but all bulbs are fine. So I hooked my scanner to it and the code that keeps coming up is HVAC controls U1509-00 LIN BUS 9- Malfunction. This has been going on for months and I cannot figure out what’s wrong. I checked all bulbs, fuses and wires. All is fine. Any ideas? 

3496C402-482F-4A1E-AC98-4CBA74185963.jpeg

42A9BBFB-0499-4C96-BA32-FFE00F19F654.jpeg

A4F86EC1-438D-4CE8-B750-0033B7375318.jpeg

Sounds like aftermarket tail lights.  I have this exact problem and even with the resistors provided, it still happens.

 

Johnny21750 New Member

Johnny21750

Posted
  • Author
Posted

I am the original owner and bought it off the show room floor when it was new. Everything is factory. I have not changed or upgraded a single thing. I checked the trailer plug in and all is fine. Even checked all wiring above the spare tire and followed the wire harness to the fuse box’s. Everything looks as it should. All light bulbs work great but blinks fast after a few seconds and I get that message

pgamboa Senior Enthusiast

pgamboa

Posted
Posted

The hyper flash is an indication that a bulb is out or a change in the current draw when turn signals are used.

The bulbs are dual filament. Turn on your park lights. Check that all 4 bulbs are illuminated. Then have someone step on the brakes. Do all 4 bulbs go bright?

If all 4 bulbs are functioning in both park lamp state and brake applied state, then something is causing an difference in the current draw that the BCM is sensing.


Sent from my iPhone using Tapatalk

pgamboa Senior Enthusiast

pgamboa

Posted
Posted

Also, check all 4 bulb sockets corrosion at the tail light location and underneath at the junction box. Corrosion can cause resistance in the line. Clean out any signs of it and apply some dielectric grease.

If that doesn’t work, might be a trip to the dealer.


Sent from my iPhone using Tapatalk

crankman Enthusiast

crankman

Posted
Posted
15 minutes ago, O_J_Simpson said:

Replace the bulbs.

This had the same thing when my lamps were bad in taillight flasher blinked real fast it was bad lamps

  • Like 1
  • 1 year later...
Tbone18 New Member

Tbone18

Posted
Posted

same thing just happened about 3 weeks ago, went to napa. They don't even have the truck listed and couldn't help me. After I Left, problem corrected itself, yesterday...it starts again, go to check rear turn signal bulb, completely corroded, had to chip it out with a screwdriver piece by piece. Put new bulb in, same thing. I suspect socket is no good, even after cleaning it out with contact cleaner and trying to clean the socket with emery cloth,  still no good.

  • 4 weeks later...
DML@ME New Member

DML@ME

Posted
Posted

Just had this same turn signal failure warning occur on my 2018 Sierra with factory LED taillights.  The light actually worked in all functions but would register a warning after the fourth flash.  Deal went about trouble shooting and back to GMC for guidance because it all tested out and no codes in the control module.  3 hours later and un-spooling the wiring harness they found a corroded / chafed wire in the harness from the engine bay to the rear of the truck.  

  • 3 months later...
capitalheel New Member

capitalheel

Posted
Posted (edited)

this happened to my 2017 Tahoe immediately after a new battery was installed last week - both right and left indicators. it went away after one night. will see if the failure errors reappear...

Edited by capitalheel
  • 4 weeks later...
TreyG77 New Member

TreyG77

Posted
Posted (edited)

Having the same issue with my 2018 Sierra. Front left turn signal indicator failure. Replaced the bulb. Worked for a day , no issues. Now , same thing is happening again. 

Edited by TreyG77
CrawlSlow Enthusiast

CrawlSlow

Posted
Posted (edited)

Scan to see if you get any code, that's the first step.

 

Maybe it's a bad bulb, replace again, if it keeps popping then there's a problem for sure.

Edited by CrawlSlow

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • Chuck FB
      Tire psi

      By Chuck FB · Posted

      Its just that it worked on 2024 trucks on this forum and my 2025 model truck, unless GM did something since that point to screw up access or Autel has a bad update. I haven't had need to use my tool since last year when I did the changes to the placard pressure settings and since then I updated the software on my Autel but have not plugged into the OBD so hard to say if I would get a surprise as well.    All I know last year when I bought the Autel I was warned to be sure to update it before I tried using the unit as they said who knows how long ago unit itself was actually manufactured as the software could be way out of date. 
    • Chuck FB
      Tire psi

      By Chuck FB · Posted

      And so you had gone through the process of registering and updating the tool and so on ?. All I can say is that on the front page as the tool fires up you go to advanced mode, then vehicle model comes up and you choose Silverado ( not the DRW or EV  since your a single rear wheel ) , then I think its choice 2 which is 07/2021 - 12/2026 ( 433mhz 13542523 ) as that is the series of tpms sensors and then go down to choice 5 which is tire type/pressure selection. Hit yes and it says to connect to OBD port and turn ignition on.    Having said this, I updated the software in my tool lately and these year range choices look different from the past due to them doing some updates it would appear and I have not connected up to the OBD port since last year so hopefully I am not in for a surprise with them screwing up the software and that it won't work on my truck anymore either.    So my question is, when you plugged into the OBD and started your truck it had that message on the Autel screen "vehicle not supported" ?. That does seem odd as tire shops would be pissed right off if hey can't use their tool on the model year after mine that in theory is supposed to be much the same truck ... unless GM did some change in the computer system to block certain things from access. 
    • Atlas
      Tire psi

      By Atlas · Posted

      Understanding and using modern scan tools is its own body of knowledge. I had little hope that would work...programming access to the BCM is probably required and that is not easy for us consumers. Expensive scan tool, GM programming subscription, online authentication, etc.   It also may be a matter of finding the right dealer to program it for you. Flashing a modern BCM might be a little too advanced for most tire shops.
    • SwitchBladeSierra
      AUX switch install

      By SwitchBladeSierra · Posted

      Update for anyone following:    Installed everything as shown in diagram. Opted for 8 AWG from Battery Positive to a 50A resettable inline breaker. 8 AWG is tied into to 2x 12 AWG wires feeding a 6 way fuse bus in parallel (manufacturer’s design of what I purchased).    4 of the 6 fuses available for circuits are tied to terminal 30 of each relay. I tied a jumper from one of my spare circuits off the bus to terminal 86 of each relay. The trigger, terminal 85, was pulled from my interior by way of T-Taps from the X61A-X5 pins 10, 11, 17 and 23. This was the hardest part of the job. Even with the X61A unbolted and the X5 removed - there was VERY little wiggle room.  I added back up lights that I want to come on with my cargo lamp - but when I would check continuity between S48A-X1 pin 18 to its respective landing point on the X61A-X5 it triggers the factory relay… Instead I opted for a add-a-fuse on the passenger interior fuse panel (fuse location 10 - cargo lamp) and ran it through the boot on the driver side to my load. Did this to avoid introducing any electrical gremlins.   Note: Please check for continuity between the S48A-X1 and the X61A-X5. In my case wire colours were not the same as other’s who have posted. To do a continuity check you need a Multimeter. Completely disassemble the S48A-X1 and remove the brown face plate off the X61A-X5 by way of a flat head screwdriver - this was the only way I could get any results.   The outputs, terminal 87 of the relays, were fed into a junction box and landed at Individual studs and were labelled Aux 1-4.    At this point, all you need to do is run wire to your loads and bring them to ground. I created a negative bus in the engine bay, all my negatives land here.    For anyone having issues with all of your new aux switch lights coming on with the press of one - I noticed this only to be an issue when the battery wasn’t hooked up to my relays? No idea why, but it was quickly corrected by having my system buttoned up and functional.     
    • jgaudet99
      Tire psi

      By jgaudet99 · Posted

      Well I ordered the Autel ts508, and it won't work on my truck I tried all the 2023 and everything it just says vehicle not supported lol   I'm able to send this unit back, so I'm going to do that, then I'll just stop into a some tire shops and if none of them are able to do it, I guess ill have to spend a bunch of money to get a good scanner..... Thanks GM lol

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...