Jump to content

Trailer lights don't work

Jimmyjam
 Share

Recommended Posts

SuperAllTerrain Enthusiast

SuperAllTerrain

Posted
Posted
I've got a 2016 CC LTZ short box and no matter what trailer I pull i have no drivers side turn signal or brake light. I even rewired my trailer (and my buddy hooked up his truck to it and it works fine) and have pulled my buddies boat( didn't work on mine). Still doesn't work. I am bringing it in to the dealership on Monday. But just was wondering if anyone else has had the same issue?
 
 
Sent from my iPhone using Tapatalk

Did you figure the problem I have the same issue


Sent from my iPhone using Tapatalk
SuperAllTerrain Enthusiast

SuperAllTerrain

Posted
Posted
I have a 16 Silverado with the same problem there are 2 relays in the circuit board that controls each side for the brake and turn signal under the fuse box that if the fuse don't blow it will burn the relay up I just changed the whole fuse box out cost me $232 and about 10 minutes and I got mine working again. Chevrolet has a bulletin out about using cheap fuses causing a lot of trouble. If I can help with pictures message me. Also my camper had a short I used a cheap fuse and that's what took mine out.

Yes please help out with pictures I’m having the same issue


Sent from my iPhone using Tapatalk
Michael04 New Member

Michael04

Posted
Posted (edited)

Easiest way to see if the relay is burnt out is to cut the switch on without starting your truck flip the turn signal to either left or right pop the hood and in the fuse block you should be able to hear the relay clicking if you don't that's more than likely your problem. If you look close above the 2 10 amp fuses the fuse for one of the turn signal is melted

IMG_20200101_193354352.jpg

Edited by Michael04
  • 2 months later...
  • 3 months later...
bububabo New Member

bububabo

Posted
Posted

 Jimmyjam, did you ever figure the problem out?

I've got the same issue lately and I think it's the fuse too.

Pain in the butt though.

 

  • 9 months later...
Hugrafix New Member

Hugrafix

Posted
Posted

I have a 2015 Silverado and bought a boat and the trailer lights werent working.  I got the left blinker/brake working and found the issue was the ground, once I cleaned the mounting area the blinker and brake started working.  This is where I made my mistake, as the blinker was still blinking I was getting all my other wires fastened, I touched one of the wires to the trailer and it shorted  both the blinker and brake lights on the left side.

 

I bought all new lights and wiring as they were mismatched anyhow and rewired the trailer, when I tested still no blinker or brake on left side.  After checking everything, I found out about the trailer FUSE which when I checked it was blown.  I ordered fuses last night and replaced FUSE 14 which is for the trailer left turn and brake, tested again and no change, still no left turn or brake.  

 

All lights on Right side work and running lights on left side.  I also grounded to trailer with jumper cables just to make sure that was not the issue.  What can I do next to get my issue resolved?

  • 4 weeks later...
Tech Junky New Member

Tech Junky

Posted
Posted

Having the same issue on my 2017 Denali 2500HD. Tried turning the auto lights off and turning on manually but that didn't work. Currently only the right trailer turn signal does not work. Checked the fuse and it's good. Tested for voltage at the fuse and nothing. Turning on the left turn signal I can hear a click like a relay is being engaged and disengaged as the light blinks but do not hear that when the right signal is on. Thinking it's the 'engine compartment fuse block'. No signs of melting though. Thankfully I have an extended warranty and that is covered. Will post once I have it diagnosed and fixed. Will be a few weeks.

Ravenkeeper Senior Enthusiast

Ravenkeeper

Posted
Posted
4 hours ago, Tech Junky said:

Having the same issue on my 2017 Denali 2500HD. Tried turning the auto lights off and turning on manually but that didn't work. Currently only the right trailer turn signal does not work. Checked the fuse and it's good. Tested for voltage at the fuse and nothing. Turning on the left turn signal I can hear a click like a relay is being engaged and disengaged as the light blinks but do not hear that when the right signal is on. Thinking it's the 'engine compartment fuse block'. No signs of melting though. Thankfully I have an extended warranty and that is covered. Will post once I have it diagnosed and fixed. Will be a few weeks.

Have you metered out the receptacle on the truck?  Or get a receptacle tester.  If the receptacle works as advertised, then it's the trailer.

 

Amazon.com: CURT 58270 7-Pin RV Blade Trailer Wiring Towing Vehicle Socket Tester: Automotive

 

Four-Way Trailer Light Tester

  • Like 1
  • 1 year later...
  • 3 months later...
paul Sufady New Member

paul Sufady

Posted
Posted
On 5/10/2019 at 9:32 AM, Michael04 said:

I have a 16 Silverado with the same problem there are 2 relays in the circuit board that controls each side for the brake and turn signal under the fuse box that if the fuse don't blow it will burn the relay up I just changed the whole fuse box out cost me $232 and about 10 minutes and I got mine working again. Chevrolet has a bulletin out about using cheap fuses causing a lot of trouble. If I can help with pictures message me. Also my camper had a short I used a cheap fuse and that's what took mine out.

 

  • 3 years later...
SquattedChevOnBlack Enthusiast

SquattedChevOnBlack

Posted
Posted
On 4/26/2021 at 3:02 PM, Tech Junky said:

Having the same issue on my 2017 Denali 2500HD. Tried turning the auto lights off and turning on manually but that didn't work. Currently only the right trailer turn signal does not work. Checked the fuse and it's good. Tested for voltage at the fuse and nothing. Turning on the left turn signal I can hear a click like a relay is being engaged and disengaged as the light blinks but do not hear that when the right signal is on. Thinking it's the 'engine compartment fuse block'. No signs of melting though. Thankfully I have an extended warranty and that is covered. Will post once I have it diagnosed and fixed. Will be a few weeks.

💀*dies waiting for the warranty diagnosis and fix*

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

    • Tyler Gibbs
      PF63 Oil Filters Going Away?

      By Tyler Gibbs · Posted

      Oh dear god why
    • AndrewF
      Scan Tool Recommendation

      By AndrewF · Posted

      I am in the market for a bidirectional scan tool so was hoping someone can help point me in the right direction. There are so many options out there it is hard to narrow down which make/model to choose.   I have always done my own vehicle work so looking to maximize capability with the scanner. Ideal price is $1k or less but would be willing to exceed if it opens up significant benefits.  Currently my 24 2500 is the newest vehicle but also have a few mid to late 2010s Subarus as well.    It seems that the Autel MP900 has a decent amount of features at a reasonable price?
    • C/K Man
      Silverado 4500-5500-6500 are they still being produced? Would have sold better as GMCs as well

      By C/K Man · Posted

      There was talk over the last couple of years that the contract to build these trucks between GM and International would not be renewed.  International moved production of all their other trucks besides the companion CV model out of the Springfield plant some time ago when they opened their San Antonio plant.  That left Springfield only building the Silverado Medium Duty, International CV Series, and some Express/Savanna long wheelbase cutaways.  International also put the plant up for sale some time ago.  This all answered my earlier question as to why GM and International did nothing with these trucks since they were introduced, as they had basically become a market 'placeholder' with a finite life.    The Silverado Medium Duty/International CV trucks were interesting combination of a GM powertrain, electrical system, and K2XX Silverado cab with an International chassis that was supposedly designed for a step-van type vehicle they never produced.  They were manufactured in International's Springfield plant along with the IH MV series initially.  When first introduced, there was much talk that the Silverado Medium Duty/CV would eventually get a gasoline engine option along with other upgrades and GM and IH would work on a class 6/7 joint venture truck.  This was before VW bought Navistar out, after that happened no more was said.  Draw your own conclusions...   About the time talk started that the GM/IH joint venture was not going to be renewed, rumors started that GM would develop a new line of medium duty trucks themselves.  The story is the new trucks will be part of the next generation HD's due in 2028, and will still feature a 'straight rail' chassis design that the current medium duty has.  GM views this as a desirable feature that differentiates their truck from the competition.  A gasoline engine option is also expected.  As the current Silverado Medium Duty remains in production until September 2026 and there is still a lot of inventory available do not expect any official word for some time.   I believe GM remains committed to their successful partnership with Isuzu, and all the LCF models will still be available from Chevy Commercial dealers.  Isuzu is on the cusp of opening a new large plant in South Carolina and there is also speculation that this may result in new product for both Isuzu and Chevy Commercial dealers.                  
    • davester
      push to talk button

      By davester · Posted

      drive the truck back to the dealer and complain that the button works.
    • davester
      push to talk button

      By davester · Posted

      drive the truck back to the dealer and complain that the button works.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...