Jump to content

Electrical Problem

NARDA1

Recommended Posts

NARDA1 Enthusiast

NARDA1

Posted
Posted

Both taillights of my sons truck quit working. Brake lights and signals work fine. Tried a new switch and lights, still not working. Figure it has to be in the harness between the taillight T connector and the headlight switch. Has anyone had a similar problem and can tell me where to look for specific areas for abrasion or breaks? Thanks. Terry

ChevyTech77 Senior Enthusiast

ChevyTech77

Posted
Posted
Both taillights of my sons truck quit working. Brake lights and signals work fine. Tried a new switch and lights, still not working. Figure it has to be in the harness between the taillight T connector and the headlight switch. Has anyone had a similar problem and can tell me where to look for specific areas for abrasion or breaks? Thanks. Terry

 

??? <on the bold>

 

The only time there was a T connector under the rear of these trucks is when it was added for trailer wiring. Remove it and see what happens. Other than that, a test light, and working from rear to front on that brown running light circuit, is your friend. Could be a turn signal switch, also, but I doubt it.

Squirrely Enthusiast

Squirrely

Posted
Posted

Similar thing happened to me. My ground wire to the chassis was almost toast. I had just enough ground to run lights, but no turn or brake.

 

I've also seen people try to splice in a wiring harness using a crimp style connector. I've seen these chop the wire in half killing the lights.

NARDA1 Enthusiast

NARDA1

Posted
  • Author
Posted
I just have to ask if you checked the fuse.

:uhoh:

 

There are fuses for turn signals and brake lights, but not for the tailights.

bronyaur Enthusiast

bronyaur

Posted
Posted
I just have to ask if you checked the fuse.

:uhoh:

 

There are fuses for turn signals and brake lights, but not for the tailights.

 

 

You better check. The fuse for the taillamps is usually connected to the dash lights. After stopping hundreds of vehicles for running at night without taillights and helping them change the fuse instead of issuing a fix-it ticket, I can assure you the taillamps are fused.

NARDA1 Enthusiast

NARDA1

Posted
  • Author
Posted
I just have to ask if you checked the fuse.

:uhoh:

 

There are fuses for turn signals and brake lights, but not for the tailights.

 

 

You better check. The fuse for the taillamps is usually connected to the dash lights. After stopping hundreds of vehicles for running at night without taillights and helping them change the fuse instead of issuing a fix-it ticket, I can assure you the taillamps are fused.

 

 

 

 

 

Thanks, I'll check that out.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.6k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    343,007
    Total Members
    8,960
    Most Online
    Brendan C
    Newest Member
    Brendan C
    Joined

  • Who's Online   2 Members, 0 Anonymous, 1,058 Guests (See full list)

  • Latest Articles

  • Posts

    • Grumpy Bear
      The Peckish Synapse

      By Grumpy Bear · Posted

      You can always count on greed to prey on ignorance and stupidity.    Friend bought a 2019 Ford Flex and asked me about using Valvoline R&P 5W30 in it. Told him give the miles on it and the fact it wasn't yet using oil that it was a good plan. He uses a Valvoline quick change shop for his oil service.   First they tell him that isn't the oil the OEM recommends. He told them he didn't care what the OEM thought. Then they floated the, "But it will void your warranty"    His reply was it's a 2019, there is no warranty and informed them their knowledge of the law was lacking.    Then they tell him 'But it will ruin your motor"!.    Mine to ruin he says. Finally they give in and charge him 150% the semi-syn price    Point it the brainwash is so embedded that even the service industry is drunk on their swill. The public is right behind them. Echoing the same lies on every forum and media platform. If the end goal is indeed EV then I'd say that ship is about built. 
    • CamGTP
      Gas Prices

      By CamGTP · Posted

      Diesel hit $6.00 here today at the truck stop.   Payed $2.79 for E85 today too.
    • richard wysong
      Electrical Problem - solved

      By richard wysong · Posted

      Thanks for posting, I'm sure it will help someone
    • Brendan C
      2026 6.6 L5P oil cooler leaking oil at 4,000 miles

      By Brendan C · Posted

      New to diesel trucks. I happened to find my oil cooler leaking oil externally with only 4,000 miles on the truck. I didn’t realize this was an issue until I started researching it. Dealer is going to replace it under warranty but I’m wondering if there’s anything GM is working on to fix this issue. I’ve heard the oil filter used is the same as they use on their V6 motors and that’s what is causing the problems. Should I switch to a bigger filter or keep using the OEM recommended? 
    • Vu1can
      Seems to be Missing a lot of Updates

      By Vu1can · Posted

      So, GMCustomerService:  Judging by the Update History pictured above, is this truck missing any updates that it actually needs. If it's just for the infotainment system, the radio is working fine and no trouble with SeriusXM. and Android Auto is working fine wirelessly with my phone. Some months ago, an update notice was sent to my truck. I approved the update and it finished saying that the update was successful, but it seems that whatever that update was, it didn't actually get installed - at least not if I'm to go by the Update History shown above.   So, again, are there any updates that this truck really should have? I've checked with my dealer but they're reluctant or commit to anything and if I want them to check, they require a $200.00 fee just to check it out and then I'd have to pay for the actual update(s).    Ignorance is bliss, and if none of the updates goes to fixing any mechanical discrepancies, I'll just leave things as is.  

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...