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The ultimate headlight upgrade H4 (not LED or HID)

Discussion in '2nd Gen. Tacomas (2005-2015)' started by crashnburn80, Oct 27, 2015.

  1. May 16, 2024 at 9:06 PM
    #5301
    Yuddzy

    Yuddzy Member

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    I have a broken passenger side headlight housing and a cracked grille that I'm planning to replace pretty quick here. Good excuse to do a little lighting upgrade at the same time. Just placed my order for the Headlight Services harness, have yet to order the Osram 100/90 bulbs. Currently running Osram Nightbreaker +200% bulbs on the stock harness. Light is alright, but wish it were a tad better at times. I'm in deer country, so I feel it's worth the cost to get this upgrade done. Will update when it all comes together.
     
  2. May 17, 2024 at 7:09 AM
    #5302
    Toy_Runner

    Toy_Runner Well-Known Member

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    http://www.danielsternlighting.com/tech/aim/aim.html

    Take the time to re-aim both lamps following the instructions in the link above, and you'll be very pleased with your headlamp upgrade. I have the OEM LED headlights in my '22 tacoma, but I did this upgrade on my old '99 4runner (lamos are similar in size to the tacomas H4 lamps) and it was a massive upgrade I wish I had known about years earlier.
     
    crashnburn80[OP] likes this.
  3. May 19, 2024 at 1:17 PM
    #5303
    Adoucet11

    Adoucet11 Member

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    Ok,
    Thanks a Bunch!
     
  4. May 19, 2024 at 1:50 PM
    #5304
    phazedplasma

    phazedplasma Member

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    Was asked to cross post in this thread for trouble shooting a 1st gen issue:

    Having an issue with this upgrade on my ground switched 99.

    Installed everything. Passenger headlight is good, measure high/low voltage on new connector etc.

    Drivers side is extremely dim, no voltage detected. Unplugged the trigger took out the fuses from the new harness and measured voltage on the original drivers side connector. Voltage is good on both high and low.

    Also swapped the bulbs, same issue.

    it looks like an issues with with m/f connection on the drivers side but im a bit confused what to troubleshoot next... Both fuses on the harness look good as well
     
  5. May 19, 2024 at 4:34 PM
    #5305
    Tiedie

    Tiedie Well-Known Member

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    Ok I had an issue with not osram bulbs as soon as I spread the contacts out and fit them in no more issues. Then I received my osram bulbs and no issues.
     
  6. May 19, 2024 at 7:09 PM
    #5306
    phazedplasma

    phazedplasma Member

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    Hmmm this is with the 100/90 Osrams
     
  7. May 20, 2024 at 4:31 AM
    #5307
    Tiedie

    Tiedie Well-Known Member

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    I only knew it was the 1 bulb because I switched sides and it went from left to right issue. Sooo maybe it's something that simple.
     
  8. May 21, 2024 at 10:38 AM
    #5308
    phazedplasma

    phazedplasma Member

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    Yeah that was the first thing I tried, swapping bulbs. No dice
     
  9. Jun 2, 2024 at 1:13 AM
    #5309
    Yuddzy

    Yuddzy Member

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    Wiring harness is in, new OEM smoked headlight housings going in sometime next week. Harness install was easy, all went well. I'm new to electrical and I do have a couple of questions I'd like some better educated members to clarify if possible. I'll try to keep it short.

    I found this thread: https://www.tacomaworld.com/threads/grounding-point-around-the-battery-area.741699/
    (yes it's 3rd gen, but general enough to not matter).

    A reply there basically states that grounding to the battery is not a good idea. My harness has, per the instructions, the black cable grounded directly at the battery. Is this okay?

    There is a body ground on the inside of the fender that stems directly from the negative battery terminal, I suppose I could just move it there if necessary.
     
  10. Jun 2, 2024 at 6:38 AM
    #5310
    Tiedie

    Tiedie Well-Known Member

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    You'll be fine with that. If you look the battery is grounded there too.
     
  11. Jun 2, 2024 at 12:11 PM
    #5311
    crashnburn80

    crashnburn80 [OP] Vehicle Design Engineer

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    The ground is floating/isolated in this case, those rules don’t apply as noted in that thread saying it isn’t necessary for floating/isolated grounds. Grounding to the negative battery is fine, a chassis ground is fine too, but not necessary.
     
    Last edited: Jun 2, 2024
    Norton and Tiedie like this.
  12. Jun 3, 2024 at 7:27 AM
    #5312
    Dalandser

    Dalandser ¡Me Gustan Las Tacos-mas!

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    Well it took some time, but I ordered a male H4 pigtail and wired up a harness to run off of the passenger side connector. I couldn't find an accurate diagram for high beam / low beam / ground but since there are only 3 wires, I did a test to see which ones would make them light up. Interestingly there were two combinations that made the BD's turn on, but one was dim and the other was as bright as hooking them up directly to the battery. Also, the BD's stay on while the high beams are on which was interesting, as I had them wired to come on with the low beams and thought they would turn off when the high beams were switched on. Not a problem, but makes me wonder if high beams switched on still give the low beam filament voltage on the stock bulbs?




    upload_2024-6-3_7-27-32.png
    upload_2024-6-3_7-25-30.png
    upload_2024-6-3_7-24-55.png
     
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  13. Jun 10, 2024 at 5:48 PM
    #5313
    amp3d

    amp3d Well-Known Member

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    Are you all really paying $150 usd for a wiring harness? Lol
     
  14. Jun 10, 2024 at 6:50 PM
    #5314
    Sharpish

    Sharpish Well-Known Member

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    It hurt, I waffled for a while. But honestly it’s a damn fine harness and you couldn’t build it yourself for $100 so meh
     
  15. Jun 10, 2024 at 7:10 PM
    #5315
    amp3d

    amp3d Well-Known Member

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    I guess if money is no object for some its fine.
    I have few harnesses laying around from past retrofits (motorcycle, tacoma, my 2 cars etc) and I can't ever remember spending more than $30. Never had one failure yet.

    I don't think one needs to spend that much on a harness imo.
     
  16. Jun 10, 2024 at 7:29 PM
    #5316
    Norton

    Norton Senior Member

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    Your opinion is just that and, given you appear to have checked into this nearly nine-year-old thread less than two hours ago, it seems premature for you to render such critical opinions. Suggest you spend some time educating yourself on the preceding 5300+ posts before rendering judgement.
     
  17. Jun 10, 2024 at 9:41 PM
    #5317
    Dalandser

    Dalandser ¡Me Gustan Las Tacos-mas!

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    I have a $150 and a $30 harness going strong in two of my trucks for 6 months now. We’ll see if one outlasts the other…
     
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  18. Jun 11, 2024 at 5:10 AM
    #5318
    wdb

    wdb intolerance intolerant

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  19. Jun 11, 2024 at 6:08 AM
    #5319
    Green Jeans

    Green Jeans 6MT AC TRD OR 1GR-FE FTMFW

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    I did. I’d would do it again.
     
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  20. Jun 11, 2024 at 6:41 AM
    #5320
    bartender138

    bartender138 Member

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    Considering the alternatives (and costs) for improved headlights, I feel it's the best $150 I've spent on my Tacoma. Your mileage may vary...
     
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