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: 27661
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

2002 GMC Sonoma: running lights..Ive checked the fuse box..fuses look

Resolved Question:

I have a 2002 GMC Sonoma. My rear running lights do not work. I've checked the fuse box on the left end of the dash, fuses look fine. Mechanic replaced bulbs, confirmed that there is current going to the back of the truck, but the wires appear to go through a brown female connector above the spare tire, and there is no current going to the tail lights. Is there supposed to be some kind of cap on this connector (which I'm guessing is there to connect to trailer wiring) that acts as jumper to send current to the rear running lights? All other lights on the truck work, with the possible exception of the license plate lights, which just realized I didn't check.
Submitted: 2 years ago.
Category: GM
Expert:  GM Tech (Cam) replied 2 years ago.
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.

Do you have a trailer plug attached?
Customer: replied 2 years ago.
I think there is. The wiring under the truck appears to be the original factory wiring. Above the spare tire the brown wiring from the front of truck goes to a female connector, from the back of which more brown wires go to the tail lights. According to the mechanic who checked the wiring, there is current to this connector, but no current past it. The female connector is about 1/4" tall and 1" wide. The inside of this connector is very clean, no dust or dirt. Is there some kind of removable dust cap that belongs there that also acts as a jumper that is supposed to be there? I'm assuming this female connector is for trailer wiring.
Expert:  GM Tech (Cam) replied 2 years ago.
Are both right and left out? These should have a separate line for each side, a brown for one and a brown with a white stripe for the other. Do both have power?


As for the lights and junction at the back, there is a junction pack that looks like a connector with a cap that splits the wiring to the lights and license bulbs.
Customer: replied 2 years ago.
Yes, both bulbs are out. As I understood the mechanic that looked at my truck there is no power at either bulb. If what I have called a connector is the junction pack, there is no cap on it. You can look inside it and see the contacts. Could a missing cap for the junction pack be the problem? Or do you see something else?
Expert:  GM Tech (Cam) replied 2 years ago.
That could be. What are the wire colours in it?
Customer: replied 2 years ago.
I remember being shown all brown wires attached to the back of the junction pack, and seeing narrow white lines on the side of some of the wires. I think I saw a total of 8 wires. I couldn't say for sure how many wires had the white stripe, but I would guess no more than half the total at most.
Would there be a junction pack in the front end that I could borrow the cap from and test in this one? If so, where would it be found?
Expert:  GM Tech (Cam) replied 2 years ago.
There would not be, so if they Are the same color then simply splice the browns together and the brown and white stripes together to correct this issue.
Customer: replied 2 years ago.
Last questions, I think. What is the purpose of the junction pack? Or put another way, why does GMC put a junction pack in the factory wiring harness? Will removing it cause any complications later in installing wiring for a trailer?
Expert:  GM Tech (Cam) replied 2 years ago.
The pack is put in to splice the wires in a clean way, removing it and manually splicing the wires will be just fine and cause no issues.
GM Tech (Cam), GMC Mechanic
Category: GM
Satisfied Customers: 27661
Experience: GM Grand Master Technician 2007. 11 years experience.
GM Tech (Cam) and 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