1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site
    Quick Links: Small cup holders CB Radio Those who camp w/ DCLB Street offroad tires 2020 Differential Breather Fixing a little sag

Trailer Light Problem

Discussion in '3rd Gen. Tacomas (2016-2023)' started by damnfingers, May 24, 2017.

Page 2 of 3
  1. May 24, 2017 at 5:12 PM
    #21
    03coma

    #21
    03coma Well-Known Member

    Joined:
    Nov 11, 2006
    Member:
    #203
    Messages:
    941
    Gender:
    Male
    New Jersey
    Vehicle:
    2015 DCSB TRD, SR5
    TRD Pro Grille, Skid Plate, TRD Cat-Back Exhaust System, 2017 Tacoma TRD Rims, ARE Series II Lid,
    There should be a fuse labeled towing lights 30a and one back up LP 10a that problem is really strange. Let us know what the out come is at the dealer OP
     
    Last edited: May 24, 2017
    03coma, May 24, 2017
    #21
  2. May 24, 2017 at 5:19 PM
    #22
    tomwil

    #22
    tomwil Well-Known Member

    Joined:
    May 15, 2014
    Member:
    #129887
    Messages:
    8,025
    Gender:
    Male
    East Coast USA
    Vehicle:
    2014 Reg Cab 4x4
    tomwil, May 24, 2017
    #22
    TacoTRD78 likes this.
  3. May 24, 2017 at 5:21 PM
    #23
    IronPeak

    #23
    IronPeak PermaLurker

    Joined:
    Mar 9, 2016
    Member:
    #180799
    Messages:
    3,232
    Gender:
    Male
    First Name:
    AuggieX
    Back to Back
    Vehicle:
    2007 sr5 4x4 DCLB/2015 TRD sport 4x4 DCLB sold
    Bigger Taller Slower
    Places that sell trailers and auto parts stores will usually have a tester available for use, free.
     
    IronPeak, May 24, 2017
    #23
  4. May 24, 2017 at 7:48 PM
    #24
    myoldmantruck

    #24
    myoldmantruck Well-Known Member

    Joined:
    May 19, 2017
    Member:
    #219438
    Messages:
    55
    Gender:
    Male
    How would he know then that they were overheating?
     
    myoldmantruck, May 24, 2017
    #24
  5. May 24, 2017 at 8:34 PM
    #25
    Herniator

    #25
    Herniator Well-Known Member

    Joined:
    Apr 9, 2015
    Member:
    #152886
    Messages:
    3,345
    Gender:
    Male
    Edmonton
    Vehicle:
    2016 Toyota Tacoma TRD Sport
    chrome valve stems covers
    Use a Voltmeter and the chart on post #17. Check to see if your connections are good. Might need to be cleaned in order to make a good contact.
     
    Herniator, May 24, 2017
    #25
  6. May 24, 2017 at 8:47 PM
    #26
    MESO

    #26
    MESO Major Modder Vendor

    Joined:
    Feb 16, 2015
    Member:
    #148809
    Messages:
    16,294
    Gender:
    Male
    State of Jefferson
    Vehicle:
    2016 DCLB TRD HELLCAT SWAP
    I never said it was overheating. My guess is that it is a resistance based issue with all the fancy computer systems in the truck. It just sences a short and/or too much load and goes into a fail safe. Then you have to turn truck off, back on and it tries again.
     
    MESO, May 24, 2017
    #26
    damnfingers[OP] likes this.
  7. May 24, 2017 at 9:30 PM
    #27
    myoldmantruck

    #27
    myoldmantruck Well-Known Member

    Joined:
    May 19, 2017
    Member:
    #219438
    Messages:
    55
    Gender:
    Male
    The OP said it.
     
    myoldmantruck, May 24, 2017
    #27
  8. May 24, 2017 at 11:36 PM
    #28
    Z50king

    #28
    Z50king DCLBOR4X4FTW

    Joined:
    Jun 9, 2015
    Member:
    #157056
    Messages:
    8,402
    Gender:
    Male
    First Name:
    Eric
    Southern California
    Vehicle:
    2016 DCLB Off Road 4x4 Super White
    Stock and loving it
    I assume you have a bad plug on the truck end. Take it to a dealership
     
    Z50king, May 24, 2017
    #28
  9. May 25, 2017 at 5:24 AM
    #29
    damnfingers

    #29
    damnfingers [OP] Well-Known Member

    Joined:
    Apr 4, 2011
    Member:
    #54324
    Messages:
    597
    Gender:
    Male
    First Name:
    Gene
    Mississippi
    Vehicle:
    2016 Limited 2x4 DCSB
    Yes...
     
    damnfingers, May 25, 2017
    #29
  10. May 25, 2017 at 5:26 AM
    #30
    damnfingers

    #30
    damnfingers [OP] Well-Known Member

    Joined:
    Apr 4, 2011
    Member:
    #54324
    Messages:
    597
    Gender:
    Male
    First Name:
    Gene
    Mississippi
    Vehicle:
    2016 Limited 2x4 DCSB

    I was wondering about that...might be the cheap ass Harbor Freight meter...but both left and right blinker circuits read the same and the right side works fine.
     
    damnfingers, May 25, 2017
    #30
  11. May 25, 2017 at 5:27 AM
    #31
    damnfingers

    #31
    damnfingers [OP] Well-Known Member

    Joined:
    Apr 4, 2011
    Member:
    #54324
    Messages:
    597
    Gender:
    Male
    First Name:
    Gene
    Mississippi
    Vehicle:
    2016 Limited 2x4 DCSB
    No converter...7 pin to 7 pin.
     
    damnfingers, May 25, 2017
    #31
  12. May 25, 2017 at 5:28 AM
    #32
    damnfingers

    #32
    damnfingers [OP] Well-Known Member

    Joined:
    Apr 4, 2011
    Member:
    #54324
    Messages:
    597
    Gender:
    Male
    First Name:
    Gene
    Mississippi
    Vehicle:
    2016 Limited 2x4 DCSB
    Great idea...I'll try that this morning. Also planning on running the truck down to the trailer store down the street and see if they'll let me try to hook up to one of their trailers.
     
    damnfingers, May 25, 2017
    #32
  13. May 25, 2017 at 5:31 AM
    #33
    damnfingers

    #33
    damnfingers [OP] Well-Known Member

    Joined:
    Apr 4, 2011
    Member:
    #54324
    Messages:
    597
    Gender:
    Male
    First Name:
    Gene
    Mississippi
    Vehicle:
    2016 Limited 2x4 DCSB

    All lights on the truck work fine with the trailer NOT hooked up...when hooked up the right flasher will work but the left flasher won't...emergency blinker only works on the left side.
     
    damnfingers, May 25, 2017
    #33
  14. May 25, 2017 at 5:31 AM
    #34
    damnfingers

    #34
    damnfingers [OP] Well-Known Member

    Joined:
    Apr 4, 2011
    Member:
    #54324
    Messages:
    597
    Gender:
    Male
    First Name:
    Gene
    Mississippi
    Vehicle:
    2016 Limited 2x4 DCSB
    Taking it in for service tomorrow but not sure they'll be able to hook it up to a trailer to test.
     
    damnfingers, May 25, 2017
    #34
  15. May 25, 2017 at 5:33 AM
    #35
    damnfingers

    #35
    damnfingers [OP] Well-Known Member

    Joined:
    Apr 4, 2011
    Member:
    #54324
    Messages:
    597
    Gender:
    Male
    First Name:
    Gene
    Mississippi
    Vehicle:
    2016 Limited 2x4 DCSB
    There's not...I looked. BUT if it were a blown fuse the blinker wouldn't work with the trailer disconnected...and it does.
     
    damnfingers, May 25, 2017
    #35
  16. May 25, 2017 at 5:36 AM
    #36
    Keep on Truckin'

    #36
    Keep on Truckin' Well-Known Member

    Joined:
    Jul 9, 2015
    Member:
    #159075
    Messages:
    873
    Gender:
    Male
    First Name:
    Jarvis
    Indiana
    Vehicle:
    02 Imp. Red - Ext. Cab SR5 4x4- 2.7- Auto
    Rear Locker, TRD Alloy Wheels & Cooper AT3 Tires, Camper Shell ,, K&N ,Icon AALS
    Take Your trailer in with the truck for service .
     
    Keep on Truckin', May 25, 2017
    #36
  17. May 25, 2017 at 5:39 AM
    #37
    myoldmantruck

    #37
    myoldmantruck Well-Known Member

    Joined:
    May 19, 2017
    Member:
    #219438
    Messages:
    55
    Gender:
    Male
    myoldmantruck, May 25, 2017
    #37
    damnfingers[QUOTED][OP] likes this.
  18. May 25, 2017 at 5:44 AM
    #38
    TacoTRD78

    #38
    TacoTRD78 Well-Known Member

    Joined:
    Jul 27, 2015
    Member:
    #160390
    Messages:
    6,748
    Gender:
    Male
    First Name:
    John
    Stuart,fl
    Vehicle:
    15 tacoma trd off road
    4X Innovations Sliders Tech deck Bilstein 5100's OME 885 CB radio install Rear diff breather mod After market front bumper lights Redline hood struts Shorty antenna door seal protectors Glove box/ Center console motion light Trailer harness plug relocation mod/Edit SOS HC rear bumper Ditch mount Lights with CBI brackets morimoto fog lights
    So you have lights on left side of trailer? The only thing that is not working is your left turn signal? I would try another light first. Than if that dosn't solve the problem work your way back from the light to the pin connector looking for a bad ground, kinked or frayed wire. Your getting power to light there is just some kind of interruption along the way.
     
    TacoTRD78, May 25, 2017
    #38
  19. May 25, 2017 at 6:15 AM
    #39
    angrysam

    #39
    angrysam Huh?

    Joined:
    Jan 5, 2011
    Member:
    #48754
    Messages:
    1,842
    Gender:
    Male
    First Name:
    Sam
    Somebody's Shit List
    Vehicle:
    2.9 Gen- Not a cunt.
    Fleshlight and an old Farrah Fawcett poster.
    Some things to try if you haven't:

    Take your trailer connector apart and swap the left and right wires. See if the problem follows or stays.

    If it follows and is now on the right side then you have a wiring issue some where between the connector and light.

    If it stays then it's most likely in a light assembly or that light's ground.
     
    angrysam, May 25, 2017
    #39
    damnfingers[QUOTED][OP] likes this.
  20. May 25, 2017 at 6:37 AM
    #40
    Glamisman

    #40
    Glamisman Well-Known Member

    Joined:
    Oct 22, 2016
    Member:
    #200436
    Messages:
    4,663
    Gender:
    Male
    trailer manufacturers are notorious for using scotch locks, those quick connects that you squeeze with pliers to connect. They will also use the mounting screws as the ground for the trailer lights. On my 2 enclosed trailers the rear turn/brake/running light housings are mounted on the drop down door and the grounding point is through the back door aluminum skin then through the frame then through the hinges... how long do you think that lasted? In fixing it I found 3 scotch locks per circuit. One for the 7 pin lead to trailer harness, one each for the trailer harness then one each for each trailer harness to light fixture... rear light housings, running lights to the top of the box. Not saying that your factory trailer wiring was a poorly installed as mine just something to look at. Does this explain why it works with your buddies truck, maybe, like what was said earlier, Toyota's might be "sensitive".
     
    Glamisman, May 25, 2017
    #40
    damnfingers[OP] and TacoTRD78 like this.
Page 2 of 3

Products Discussed in

INNOVA 3320 Auto-Ranging Digital Multimeter, Red & Black
$31.03
To Top