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No trailer lights 2000 tundra 4x4 4.7

Discussion in '1st Gen Tundras (2000-2006)' started by Confusedboathauler, Aug 24, 2023.

  1. Aug 24, 2023 at 8:35 PM
    #1
    Confusedboathauler

    #1
    Confusedboathauler [OP] New Member

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    I'm very lost, checked main fuse ( tow package equipped) replaced the flat 4 plug all new wiring and lights on trailer that work correctly ( CHECKED WITH OTHER POWER SOURCE) , NO POWER TO CONNECTOR ON TRUCK ? Any suggestions?
     
    Confusedboathauler, Aug 24, 2023
    #1
  2. Aug 25, 2023 at 2:01 AM
    #2
    Mr.bee

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    Mr.bee King Turdra

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    Was there power at the fuse?
     
    Mr.bee, Aug 25, 2023
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  3. Aug 25, 2023 at 4:25 AM
    #3
    BubbaW

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    BubbaW Blessed 2 B above Ground

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    The 4 pin connector should plug into a 6 pin connector a short distance under truck Do you have voltage at the 6 pin connector ?

    Are you having any issues with any other systems since trailer circuit is part of other circuits covered by approx 5 fuses.

    6to4.jpg
     
    BubbaW, Aug 25, 2023
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  4. Aug 25, 2023 at 4:40 AM
    #4
    Confusedboathauler

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    Confusedboathauler [OP] New Member

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    No voltage and no other system issues. All fuses are good in both fuse panels.
     
    Confusedboathauler, Aug 25, 2023
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  5. Aug 25, 2023 at 6:55 AM
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    BubbaW

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    BubbaW Blessed 2 B above Ground

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    We can only go by what you tell us and can only assume you have double checked your self, especially your voltage readings at the 6 pin connector.

    Given the 6 pin connector I mentioned above is part of the Frame Harness, it's definitely odd that you did indeed not have no voltage there.

    If you are positive there is no voltage at T 6 connector, and "no other system issues. All fuses are good in both fuse panels", my next suggestion is to look at the 12 pin connector(BB1) under the drivers seat.
    That connector is the feed for the Frame Harness that feeds the connectors shown below.

    BB1 Harness.jpg
     
    BubbaW, Aug 25, 2023
    #5
  6. Aug 25, 2023 at 7:08 AM
    #6
    shifty`

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    shifty` Just like witches at black masses

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    I didn't think the older 1GTs had tow package?

    If not, I'd expect this to be spliced in. And if that's the case, I'm going to expect someone scotch-lok'd into wires, and as is inevitable with scotch-lok style wire-manglers, there's one or more compromised wires.
     
    shifty`, Aug 25, 2023
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  7. Aug 25, 2023 at 7:11 AM
    #7
    KNABORES

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    KNABORES Sarcasm incoming

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    My "tow package" was me adding a V5 rated hitch and the Curt wiring adapter plugged in between the rear harness plug to add the 4 flat. There is not a way that I know of to just splice into the wiring on these, an adapter is needed. Added a 7 pin round plug at a later date for trailer brake controller, had a buddy at a shop do it.
     
    KNABORES, Aug 25, 2023
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    shifty`[QUOTED] likes this.
  8. Aug 25, 2023 at 7:41 AM
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    shifty`

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    shifty` Just like witches at black masses

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    Ah yeah, I've seen those. If that's what OP is doing, I'd be pulled off the harness and testing continuity of the wires inside the adapter harness with a DMM, then.
     
    shifty`, Aug 25, 2023
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  9. Aug 25, 2023 at 11:35 AM
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    BubbaW

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    BubbaW Blessed 2 B above Ground

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    They started offering optional tow packages on the 2003 MY(V8 only), according to the brochures.
     
    BubbaW, Aug 25, 2023
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  10. Aug 25, 2023 at 12:48 PM
    #10
    w666

    #10
    w666 D. None of the above

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    w666, Aug 25, 2023
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