Jump to content

Trailer lights flash

Kevin0311
 Share

Recommended Posts

EastTexan Enthusiast

EastTexan

Posted
Posted

Seems like on my 2020 Sierra 2500HD awhile back when any of my three trailers were plugged in and the truck was turned off the trailer lights would only flash every 30 seconds or so? Lately it's almost a constant flicker with any of the trailers.

  • 1 year later...
  • Replies 35
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

Cole_dog
Cole_dog

I read the link. I would think it could check without flashing the lights on my boat all night long in a motel parking lot. If there is no fix, that’s got to be the dumbest thing I’ve ever heard of. 

OnTheReel
OnTheReel

Actually a feature, not an issue. It’s a part of the trailer anti-theft system. It pulses the trailer lights to check for load. The idea is if someone unhooks your trailer, it’ll notice the lack of cu

crankman
crankman

Interesting mine only flash if i hit the FOB to lock the truck. Why would you want your trailer lights flashing all the time day or night while it parked. Don't sound right.

demj1308 New Member

demj1308

Posted
Posted

I get the flashing lights for security, but mine flicker irregularly and every second or two, almost like morse code. A few posts i read said they were getting a flash every 10 seconds.

  • 8 months later...
tex Enthusiast

tex

Posted
Posted
On 6/26/2023 at 9:21 AM, MrMagloo said:

Same here.  Appears to be the Trailer Connector security feature.

I dont like the flickering but this says we can at least set it to one blink every 42 seconds instead of the constant light show!

https://gm-techlink.com/?p=14165

 

  • 5 months later...
Dragon rider New Member

Dragon rider

Posted
Posted
On 5/2/2019 at 8:14 AM, Rsktm300xcw said:

That link is very informative and would have been very helpful to me about a month ago. I through a ton of trial and error figured out that my trailer lights need to have just the right amount of load for everything to work correctly. A little tip, if you have LED lights and are seeing error being detected by your trailer light test adding a resistor to the circuit fixed my brake light problem. On my running lights circuit my trailer had 17 incandescent lights and they would all turn on for 1 second and then turn off every time I tried them. The trailer test showed a running light problem. I swapped all 17 out for LEDs to reduce the load and that seems to have solved my problem. So it is very important to reach the right  balance for the trailer light control module to see enough load to know that the light is working but not to overload so the module shuts the circuit off. Can be tricky. There is also an update out to "reflash" the module. I dont remember the number but it listed near the end of the cold weather electrical problem thread. My local dealer did the update as well. So far dont seem to have problems. Waiting for first long trip with the trailer to see if it is all solved.

What circut did you add the resistor, and what resistor rating did you use? THanks!

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

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.4k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,739
    Total Members
    8,960
    Most Online
    JimmyB4
    Newest Member
    JimmyB4
    Joined

  • Who's Online   6 Members, 0 Anonymous, 479 Guests (See full list)

  • Latest Articles

  • Posts

    • KARNUT
      OCI, not when but why?

      By KARNUT · Posted

      I’ve own several successful businesses. I’ve bought homes and lived in different states. I’d witness several generations buy homes and survive in different economic circumstances. You get awful sippy when people have different experiences than you do. You live a life. I’ve lived a life. It seems our experience has been different. You can point out generalized statistics. Some people learn how to thrive when the odds are against them. Living in different states does make a difference in a persons quality of life and economic outcomes and opportunities. That’s a fact Jack. It’s my truth, my life. Hard work and long hours the right environment made my families life easier. And yes moving to a different state increased the odds of that happening. Stats are generalized. People who thrive don’t make excuses. They beat the odds. Others get mad and point to those statistics. I guess that’s you. My post pointed out how you helped people beat the odds. Somehow your panties got in a wad. Go figure. 
    • MrChips
      Road Master Active Suspension

      By MrChips · Posted

      Good question, I don't remember for sure but I believe it was the HD. I will check and get back to you.
    • Grumpy Bear
      OCI, not when but why?

      By Grumpy Bear · Posted

      Point of the post sir was that while both wages and cost are rising EVERYWHERE; the cost is rising faster EVERYWHERE than the ability to buy EVERYWHERE. We're not going down the location rabbit hole. I'm aware of what economic migration is. I've lived in four states including Texas.   It's what "Purchasing Power" means.   I'm not telling you what I think. I'm telling what the government, your government, data shows.   It wasn't an argument. It wasn't a suggestion. It was a statement of FACT. You are absolutely entitled to your own opinion. Your not entitled to your own facts. If you and I were, they wouldn't be facts.    fact /făkt/   noun Knowledge or information based on real occurrences. "an account based on fact; a blur of fact and fancy." Something demonstrated to exist or known to have existed. "Genetic engineering is now a fact. That Chaucer was a real person is an undisputed fact." A real occurrence; an event. "had to prove the facts of the case." The American Heritage® Dictionary of the English Language, 5th Edition • More at Wordnik   If you'd like to disagree call your Senator or Representative and let him know his departments are in error. But you and I? We are not doing this. 
    • JimCost2014
      Transmission jumping out of gear while driving.

      By JimCost2014 · Posted

      Probably a one and done post, but do you have a CEL on the dash? Was having issues with my transmission, fortunately only a week, and it turned out to be the transmission harness. Valve body was in good shape, so new harness with all the sensors attached, new fluid, and filter. Seems to have worked so far?
    • Atlas
      Missing thrust bearing? And oil selection

      By Atlas · Posted

      Two interesting tidbits of information which are NOT related were just released.   One, regarding the possible thrust bearing issues / engine failures with the 3.0. Demonworks just did a segment in which they believe they may have found "a" or "the" cause of thrust bearing failures: A missing thrust bearing. If the engine doesn't have all its thrust bearings from the factory, the missing bearing can cause extra play which ends up destroying a nearby thrust bearing which then sends metal through the engine.       Of other importance, Lake Speed Jr released some interest information regarding oil weight selection for the 3.0. Comparisons of:   AcDelco 0w20 Dexos D Mobil 1 ESP x2 0w20 Dexos D Mobil 1 ESP x2 0w30 Mobil 1 ESP x4 0w40. Mobil Delvac 5w40   Spoiler alert: The Mobils are PAO Ester -base and the ACDelco is a Group III base. Mobil shows lower wear in their tests for similar weights. Additive packages between 20-30-40 weight ESP's appear to be the same, but only 0w20 is Dexos D licensed. Wear is even more reduced with 30 and 40 weight ESP although all perform very well and resist shear and provide very similar viscosities within temperature operating ranges in the 3.0.   There are even more surprises, so just go watch it.    

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...