How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask GM Tech (Cam) Your Own Question

GM Tech (Cam)
GM Tech (Cam), GMC Mechanic
Category: GM
Satisfied Customers: 27662
Experience:  GM Grand Master Technician 2007. 11 years experience.
Type Your GM Question Here...
GM Tech (Cam) is online now
A new question is answered every 9 seconds

my trailer brake lights work on the right side only, my left

Resolved Question:

my trailer brake lights work on the right side only, my left side turn signal works,but my right side lights up both, i get the signal from the trailers plug also. all the truck taillights work properly, where should i look next.
Submitted: 2 years ago.
Category: GM
Expert:  GM Tech (Cam) replied 2 years ago.

GM Tech (Cam) :

Hello, I'm Cam. Please include all the details about your issue so I can accurately advise you. I cannot see your vehicle so please be detailed.

GM Tech (Cam) :

Confirm this is only on the trailer, correct?

GM Tech (Cam) :

meaning the truck signal lights and brake lights are good?

Customer:

yes they are working properly on the truck with the trailer connected and unconnected.

GM Tech (Cam) :

OK they are seperate. So, on the plug, is there a proper left and right signal with the signals on?

GM Tech (Cam) :

the truck signals and brakes are independant of the trailer and the brake/signal is a single wire for each side on the trailer.

Customer:

when checking on the truck side of the connection, the left side terminal has no power when the brakes are applied, when the turn signal for the left side is on, there is only power on the left side, when you turn on the right side turn signal, you get power on both the left tern\minal and right terminal.

GM Tech (Cam) :

Now the signal flasher which also controls/splits the brake and turns for the trailer is notorious for failing, but we need to make sure it is not wiring.

GM Tech (Cam) :

same for brakes then?

GM Tech (Cam) :

And right signal only does right side on the trailer not both?

Customer:

the right turn signal also does both on the trailer. what it does at the truck connection also does on the trailer

GM Tech (Cam) :

Ok so try this, remove the TRLR RT fuse in the left dash fuse block, what happens?

Customer:

ok will go out and do

GM Tech (Cam) :

sure thing.

Customer:

when i pulled the trailer dash fuse, the right trailer light quit, but the left trailer light is still flashing.

GM Tech (Cam) :

ok, so that means the wires are not crossed and means it is the flasher on the back side of that fuse block

Customer:

okay so i will need to replace that flasher control

Customer:

i am not use to this type of flasher.

GM Tech (Cam) :

yes, replace it.

Customer:

thanks for your help.

GM Tech (Cam) :

This is a long black big relay and you need to remove the dash trim under the column to get at it

Customer:

okay. anything else i will need to know to replace it

GM Tech (Cam) :

Nope, plug and play unit.

Customer:

thank you.

GM Tech (Cam) :

Please reply back if you need additional help or press ACCEPT If my answer was helpful. You can reopen it at any time by replying to it and I will answer ASAP. PLease keep in mind that as experts on this site, we are only compensated for our time spent helping customers once ACCEPT is selected. Be sure to bookmark this page (CTRL D) to reply with results or ask more if you need. Thanks again for using Just Answer. Cam.

GM Tech (Cam), GMC Mechanic
Category: GM
Satisfied Customers: 27662
Experience: GM Grand Master Technician 2007. 11 years experience.
GM Tech (Cam) and 6 other GM Specialists are ready to help you

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
< Last | Next >
  • I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
 
 
 

Meet The Experts:

 
 
 
  • Gary

    GMC Technician

    Satisfied Customers:

    903
    15 years gm master tech/15 years ASE master tech
< Last | Next >
  • http://ww2.justanswer.com/uploads/ggrote1/2009-06-27_031011_me.jpg Gary's Avatar

    Gary

    GMC Technician

    Satisfied Customers:

    903
    15 years gm master tech/15 years ASE master tech
  • http://ww2.justanswer.com/uploads/CA/caprio23/2011-12-13_155550_20111213105344.64x64.jpg Anthony's Avatar

    Anthony

    ASE Certified Technician

    Satisfied Customers:

    476
    ASE Master Automobile Technician with over 20 years exp.
  • http://ww2.justanswer.com/uploads/Rocket2005/2009-09-13_133703_jack.jpg car tech's Avatar

    car tech

    ASE Certified Technician

    Satisfied Customers:

    448
    25 year master tech and shop owner
  • http://ww2.justanswer.com/uploads/2P/2paulm/2012-4-4_183431_justabswer.64x64.jpg Paul M ASE Master's Avatar

    Paul M ASE Master

    ASE Master Tech

    Satisfied Customers:

    187
    ASE Master Tech 20+ Years
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka- Moose)'s Avatar

    Chris (aka- Moose)

    GMC Technician

    Satisfied Customers:

    89
    16 years of experience
  • http://ww2.justanswer.com/uploads/AM/amedee/2013-10-24_23656_Amedee1.64x64.jpg Amedee's Avatar

    Amedee

    GMC Technician

    Satisfied Customers:

    360
    ASE Master Technician advanced level specialist
  • http://ww2.justanswer.com/uploads/DT/dt69nova/2012-6-15_234154_pic1.64x64.jpg Dave Nova's Avatar

    Dave Nova

    GMC Technician

    Satisfied Customers:

    2262
    ASE Master Certification. GM World Class Certification