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trailer fuse ?

Discussion in '1st Gen Tundras (2000-2006)' started by 3bears, Jul 7, 2024.

  1. Jul 7, 2024 at 1:51 PM
    #1
    3bears

    3bears [OP] New Member

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    20240707_081645.jpg so still battling with my tundra brake lights. from doing resarch there should be a fuse for it.for the factory tow package..i have the box behind drivers tail light..is this it and should it be bolted to something for a ground and I can not get the fuse out and I pulled hard. trick ? its a 30 amp fuse. If the red wire shows in picture, thats not going to the black box in picture, thats going to the brake controller that someone added
     
  2. Jul 7, 2024 at 2:16 PM
    #2
    MT-Tundra

    MT-Tundra New Member

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    That looks like the towing package fuse my truck came with. Not sure where the ground is but it's not anywhere directly off that wiring. Probably on the back end of the truck.

    Not sure what your actual issue is, but look closely at all the wiring. Obviously yeah check that fuse, but check all the wiring at the back end of the truck associated with the tow package. Mine had a few problems, but they only showed up as the trailer blinker not working. Truck blinkers worked fine.

    I haven't tried taking that type fuse out for a while. I'd say gently, with pliers. Wiggle and pull.
     
  3. Jul 7, 2024 at 9:24 PM
    #3
    BluegrapeVr6

    BluegrapeVr6 New Member

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    That does not look like mine at all. Mine look like any old inline fuse. More loke this kindScreenshot_20240708_002330_Brave.jpg
     
  4. Jul 8, 2024 at 5:31 AM
    #4
    NickB_01TRD

    NickB_01TRD You don't need less cars, just more driveway.

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    My truck has one of those but it also has one like what OP has posted.
     
  5. Jul 8, 2024 at 6:44 AM
    #5
    MT-Tundra

    MT-Tundra New Member

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    Yeah the fuse that I assume came with the dealership tow package was a large one like the OPs. When I replaced the original trailer wiring just a couple months ago, the new stuff came with a fuse more like Bluegrapes, so now that's what mine looks like too.

    From what I've read on here, the trucks that were sold from dealerships with tow packages will have the large fuse.
     
  6. Jul 8, 2024 at 8:31 AM
    #6
    3bears

    3bears [OP] New Member

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    how come you replaced the trailer wiring, can that box in the back go bad.? I had an aftermarket one go bad on me in a 4runner. Starting to think thats my problem fuse looked good.
     
  7. Jul 8, 2024 at 8:55 AM
    #7
    MT-Tundra

    MT-Tundra New Member

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    One of my trailer lights wasn't working. Worked when connected to my Tacoma, but not the Tundra, so I knew there was a problem with Tundra wiring. Everything looked original to 2002. 7-pin socket & wiring, towing package wiring, all of it, so I replaced all of it. More likely you have a connection or ground somewhere that's bad. But I didn't mind replacing it all.

    Turned out on mine to be a crimped connection that kind of exploded. I could have just replaced that connection and been good. But again, I felt like 22 years was a good service life for those wiring harnesses/connections. And I didn't find the bad connection until I had already bought the new stuff and was in the process of replacing it.
     
    Last edited: Jul 8, 2024
  8. Jul 9, 2024 at 8:48 AM
    #8
    3bears

    3bears [OP] New Member

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    picked up one of these last night. truck is at work,
     
  9. Jul 9, 2024 at 8:51 AM
    #9
    3bears

    3bears [OP] New Member

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    thanks, i picked up a new fuse assembly like bluegrapevr6..will try that today at lunch if nothing then ill order a new control box
     
  10. Jul 9, 2024 at 10:31 PM
    #10
    3bears

    3bears [OP] New Member

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    I want to thank all of you above...when I asked this question b4 it seemed to go no place. when I asked again with a picture I got helpful answers. So i picked up a new in line fuse system like listed above and installed at lunch. I NOW have trailer connections ...well at least my test light says I do,,,which it did not b4. however the pass side turn signal is a weaker signal on test lamp...but plug is very dirty so bet thats it.
    thanks again bluegrapevr6 and mt-tundra...and all else guys
     
  11. Jul 10, 2024 at 6:44 AM
    #11
    MT-Tundra

    MT-Tundra New Member

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    Great! It's always helpful when someone has just gone through something similar.

    If I had to guess, all your connections could use a cleaning, but I'm interested to see if the trailer lights work first. My wiring was just good enough to light up the 7-pin test lamp, but not the trailer lights.

    I ordered both the 7-pin socket & wiring, and the wiring harness, and when I pulled the conduit and electrical tape apart to install them, found this. Not a bad idea to trace every towing package wire at the back end of your truck and take a good look at the crimp connections and grounds. They could probably all use a cleaning, or even replace all the connections if you have a good set of wire crimpers. No idea how I was still getting enough power through this connection to light up the test lamp.

    IMG_0242.jpg
     
    shifty` likes this.
  12. Jul 10, 2024 at 8:09 AM
    #12
    3bears

    3bears [OP] New Member

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    true, i have power at the plug with a test lamp, and one side is weak, so I do plan to go through all connections
     
  13. Jul 10, 2024 at 10:27 AM
    #13
    shifty`

    shifty` The masses of humanity have always had to suffer

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    I'm glad you posted this. I was trying to remember who it was that found this crimp nightmare in their wiring, obscured. I planned to hunt for it, but didn't have the energy.

    I really wish people would wisen up and learn how to use sealed crimps for external wiring. It shocks me how little thought some people give to wiring things that are subject to the environment, especially things that are critical to road safety like lights and trailer wiring.
     
  14. Jul 10, 2024 at 11:02 AM
    #14
    MT-Tundra

    MT-Tundra New Member

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    You've mentioned that a few times and I only just now realize what you're talking about, I think. I've seen insulated crimps, but not "sealed". I just googled and realized that's a very specific thing, but I think a specialty thing? Like not something you're going to find at ACE Hardware? Looks like a pretty genius idea...Something I'll need to have on hand for future work. Is this what you mean?

    Screenshot 2024-07-10 120152.png
     
    1lowlife likes this.
  15. Jul 12, 2024 at 2:24 PM
    #15
    BluegrapeVr6

    BluegrapeVr6 New Member

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    No problem! Let me know if I can help in any other way. I just noe got around to getting u the actual pic. The one i am holding below is my factory ( or from toyota dealership ) installed tow package. It has a yellow 20 Amp fuse in it.

    20240712_171940.jpg
     
  16. Jul 14, 2024 at 1:40 PM
    #16
    MT-Tundra

    MT-Tundra New Member

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    I wonder what accounts for dealers using different style fuses? Just preference, or does it depend on region or the truck's package?

    My truck is a limited, and I noticed it came with the 'all-weather' package, which I think includes a more powerful starter and a different battery. No idea if that impacts how they approach the tow package.


    IMG_0250.jpg
     
  17. Jul 15, 2024 at 12:20 AM
    #17
    BluegrapeVr6

    BluegrapeVr6 New Member

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    Not sure. I dont tbink i have any winter packahe though. Whats that, heated seats.
     
  18. Jul 15, 2024 at 8:13 AM
    #18
    3bears

    3bears [OP] New Member

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    I havent had a chance to get back to it, but like siad replacing the old fuse assembly with a new in line with a fuse helped a lot. dont need to pull a trailer for a few more weeks, so ive got time . tons of other projects going too.
    thanks for the help
     
  19. Jul 15, 2024 at 8:14 AM
    #19
    3bears

    3bears [OP] New Member

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    interesting yours is a 20 amp, my "factory/dealer" that I replaced was a 30 amp. And my owners manual says 30 amp
     
  20. Jul 15, 2024 at 8:20 AM
    #20
    3bears

    3bears [OP] New Member

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    the winter package, depending on region can include a bigger starter. in the case of my 2002 it means a 2kw starter instead of 1.4kw
     

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