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2007 with no signals to the rear connector for trailer lights

Discussion in 'Towing & Hauling' started by captkirk, Jan 28, 2021.

  1. Jan 28, 2021 at 2:48 PM
    #1
    captkirk

    captkirk [OP] New Member

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    connector under truck (thought there would be two but I dont have the tow package) isnt gettiing voltage. metered connector out to plug on bumper and its good. tried to find and check every fuse related to trailer/tow and didnt find anything but all other light on truck are working. What am I missing?? frustrated!
     
  2. Jan 28, 2021 at 3:06 PM
    #2
    blackdemon_tt

    blackdemon_tt Battery Slayer

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    wiring is your next big project... You will need to get underneath and make sure it is plugged in to somewhere or spliced into something, worst case wiring is damaged somewhere along the lines and you will need to have it either respliced or repaired, either by DIY or someone else... I have the tow package, so my knowledge on the aftermarket equipment is somewhat limited...
     
  3. Jan 29, 2021 at 1:03 PM
    #3
    captkirk

    captkirk [OP] New Member

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    I have verified that I have good ground at the toyota connector for trailer and power 12v at the connector so running lights work but nothing for turn or brakes. checked fuses at kick panel 57 58 47 48 53 and engine fuse box 51 9 67 10 6 ang 13.. all good.
    truck lights all work except brake light on cab roof has bad bulb..
    any ideas?????
     
  4. Jan 29, 2021 at 2:57 PM
    #4
    blackdemon_tt

    blackdemon_tt Battery Slayer

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    TRD Sway Bar, Roll covers USA bed cover
    Any possibility there is an issue with the trailer wiring itself??
     
  5. Jan 29, 2021 at 3:13 PM
    #5
    captkirk

    captkirk [OP] New Member

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    I'm using a meter at the connector under the bed not connected to the 4 pin flat plug. pwr & grd but nothing else
    thanks for the response .. replaced the burnt out brake bulb at cab.. no difference.
     
  6. Jan 29, 2021 at 3:27 PM
    #6
    blackdemon_tt

    blackdemon_tt Battery Slayer

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    TRD Sway Bar, Roll covers USA bed cover
    soo... if you have good power going on from the connector, then you should be good, no??? shouldn't you be focusing on the trailer having the power issue?
     
  7. Jan 29, 2021 at 4:23 PM
    #7
    captkirk

    captkirk [OP] New Member

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    Never connected trailer just testing with meter and 4 pin test plug which i know is good
     
  8. Jan 29, 2021 at 5:07 PM
    #8
    Tundra234

    Tundra234 New Member

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    Alot of them
    There are some videos on YouTube as well that show you how to test and wire a 4 pin setup. Maybe an idea in one of them.....:notsure:
     

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