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New headlight bulbs (Hella H4 100/80W)

Discussion in '1st Gen Tundras (2000-2006)' started by kidked888, Feb 11, 2021.

  1. Feb 11, 2021 at 11:30 AM
    #1
    kidked888

    kidked888 [OP] New Member

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    So I am wanting to upgrade my current headlight to the Hella H4 100/80W bulbs, but after doing some research it seems I will need a relay harness to support the higher wattage bulbs.

    I have found some threads talking about this, but all of the links to the proper harnesses are expired. Can someone please provide an updated link for a harness that will support these bulbs...thanks

    829E90CA-65E6-4796-A313-E50D14704920.jpg
     
  2. Feb 11, 2021 at 12:54 PM
    #2
    Glock 40

    Glock 40 I'm here to break shit

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  3. Feb 11, 2021 at 1:23 PM
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    assassin10000

    assassin10000 New Member

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    Worst case scenario is you have to re-pin/rewire the harness as Toyota uses ground switching for the low/high beams and not 12v+.
     
  4. Feb 11, 2021 at 1:29 PM
    #4
    kidked888

    kidked888 [OP] New Member

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    Do you know if the headlight on 1st gens are negative switched?
     
  5. Feb 11, 2021 at 1:30 PM
    #5
    assassin10000

    assassin10000 New Member

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    They are. Mine is.

    Diagrams used for the fog light mod show this.
     
  6. Feb 11, 2021 at 1:34 PM
    #6
    kidked888

    kidked888 [OP] New Member

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    Looks like this might work then, the relays aren’t waterproof though.


    H4 LED Headlight Wiring Harness [Negative Switched Conversion] [Fused] H4 Head Light Relay Harness Kit for 9003 H6054 H5054 H6054LL 6014 6052 6053 Subaru Toyota Head Lights https://www.amazon.com/dp/B07M6W1PMK/ref=cm_sw_r_cp_api_glt_fabc_6CP7QRH2HR3PF21B804Q
     
  7. Feb 12, 2021 at 7:08 AM
    #7
    Festerw

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    This site contains affiliate links for which the site may be compensated.
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  8. Feb 12, 2021 at 12:10 PM
    #8
    onesojourner

    onesojourner Here, let me derail that for you

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  9. Feb 12, 2021 at 1:40 PM
    #9
    landphil

    landphil Fish are food, not friends!

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    I’m pretty sure all first gens use a plastic reflector housing / bulb holder, and 80/100W bulbs have been known to melt plastic housings.
     
  10. Feb 12, 2021 at 2:16 PM
    #10
    assassin10000

    assassin10000 New Member

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    For stock wiring I've been happy with Philips vision+ bulbs. Increased visibility without too much decreased life span.
     
  11. Feb 12, 2021 at 6:18 PM
    #11
    landphil

    landphil Fish are food, not friends!

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    I’m running them as well, with the same good results in multiple vehicles.
     
  12. Feb 12, 2021 at 8:22 PM
    #12
    onesojourner

    onesojourner Here, let me derail that for you

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    130w will not melt the housings or degrade the housings. Tacoma world has some real world and torture temperature testing.

    These proved to be the best in the tacoma housings.

    https://www.powerbulbs.com/us/product/osram-super-bright-premium-h4
     
    Last edited: Feb 12, 2021
  13. Feb 13, 2021 at 5:48 AM
    #13
    Professional Hand Model

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    @KNABORES

    What ever happened with your headlight experiment?
     
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  14. Feb 13, 2021 at 6:10 AM
    #14
    KNABORES

    KNABORES Sarcasm incoming

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    Better light output for sure. But gremlins abound. I believe my new harness with relays is slowly sucking my battery dry when it's parked. I believe the new setup also draws so much current during use that the battery doesn't charge properly. Got home from an out of town trip last night and the truck wouldn't start. Battery extra dead. Got a jump, truck ran rough for a minute, (ABS light is now on, great) put it in gear to drive and the truck didn't want to move forward like the trans was slipping. Powered through that and it started behaving more normal, running better and trans acting appropriately. I tried to turn the headlights on and it almost killed the engine (I had a dead battery still at this point and was relying on alternator output alone).

    So, I guess the experiment has gone poorly.
     
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  15. Feb 13, 2021 at 6:36 AM
    #15
    Professional Hand Model

    Professional Hand Model A.K.A ‘Golden Hands’

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    Ugh.
     
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  16. Feb 13, 2021 at 4:42 PM
    #16
    KNABORES

    KNABORES Sarcasm incoming

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    Update:
    Truck started right up today. Alternator must be in fine order as it charged the battery right back up on the 30 min drive home last night. I pulled the fuse from the new headlight harness, we'll see how the battery fares over the next couple days. Also, my ABS light reset itself and the truck is running and shifting great again. All is well in the world.
     
  17. Feb 13, 2021 at 6:11 PM
    #17
    assassin10000

    assassin10000 New Member

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    Low voltage woes before battery was recharged gave you some gremlins.

    I wonder if one of the relays is staying on or fried, on your headlight harness. If disconnecting it solves your issues. Maybe check resistance across terminals and see if one is bad?
     
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  18. Feb 14, 2021 at 4:56 AM
    #18
    KNABORES

    KNABORES Sarcasm incoming

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    On vacation with the wife this week. Tundy will be in time out for it's cantankerousness. I'll investigate when I get back. It's also 9 degrees here.
     
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  19. Feb 15, 2021 at 6:43 AM
    #19
    kidked888

    kidked888 [OP] New Member

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    can you attach a link?
     
  20. Feb 15, 2021 at 6:43 AM
    #20
    kidked888

    kidked888 [OP] New Member

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    Can you attach a link?
     
  21. Feb 15, 2021 at 8:35 AM
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    landphil

    landphil Fish are food, not friends!

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  22. Feb 15, 2021 at 3:28 PM
    #22
    assassin10000

    assassin10000 New Member

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  23. Feb 15, 2021 at 5:46 PM
    #23
    kidked888

    kidked888 [OP] New Member

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  24. Feb 15, 2021 at 6:17 PM
    #24
    assassin10000

    assassin10000 New Member

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    I have not.

    If I do, I'll do the H11/9012 mod at the same time.
     
  25. Feb 15, 2021 at 6:25 PM
    #25
    bmc02

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    I just did the 9012 fog light mod yesterday. Used Phillips crystal vision. Big improvement over the old 9006 they replaced.
     
  26. Feb 16, 2021 at 7:00 AM
    #26
    kidked888

    kidked888 [OP] New Member

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    What is this mod? Haven’t heard of this one yet
     
  27. Feb 16, 2021 at 7:24 AM
    #27
    bmc02

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  28. Feb 16, 2021 at 7:35 AM
    #28
    kidked888

    kidked888 [OP] New Member

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  29. Feb 16, 2021 at 7:47 AM
    #29
    bmc02

    bmc02 New Member

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    Just have to cut the top tab on 9012 to match the 9006. Wire harness is the same. Super easy. An oscillating saw worked well to make the cut. Then used a file to soften the edges a touch.
     
    kidked888[QUOTED][OP] likes this.
  30. Feb 16, 2021 at 5:16 PM
    #30
    assassin10000

    assassin10000 New Member

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    Pics borrowed from @empty_lord iirc.


    eZ3cGXgl.jpg
    H9 to H11 tab mod.jpg
     
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