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Wiring Aftermarket Lights to OEM Fog Light Harness?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Jaxon.NW, Mar 1, 2023.

  1. Mar 1, 2023 at 9:43 AM
    #1
    Jaxon.NW

    Jaxon.NW [OP] Active Member

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    Hoping to save myself some headache here...

    I just installed a new high clearance front bumper and I obviously had to disconnect the fog lights from the factory bumper skin. The new armor has a 30" cut out for a light bar that measures 30 1/2" eye to eye if anyone has yellow/amber light bar recommendations for lowlight conditions that would fit those measurements.

    I'm wondering if it would be possible to wire the light bar to one, or both, of the OEM Fog Light harnesses that are no longer in use. Then I can just use fog light switch already installed.

    My electrical skills are pretty basic, I can splice and such but I'm not sure about wire capacities when it comes to AMPS and Volts. I'm assuming wiring a bar to the harness be too much for those factory fog light wires? Bad would it really be? Could I lessen the load by wiring two 15" bars side by side?

    Just looking to get some conversation going and will answer promptly. Let me know, thank you.
     
  2. Mar 1, 2023 at 9:47 AM
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    Clearwater Bill

    Clearwater Bill Never answer an anonymous letter

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    memario1214 likes this.
  3. Mar 1, 2023 at 9:51 AM
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    rnish

    rnish Well-Known Member

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    Confirm the fuse size of the current circuit. Confirm the fuse size of the new lights. If and only if the original light was on its own circuit, was the only user, and the new light draws less or equal power, it’s a simple replacement.

    If not you need to calculate the electrical usage of everything on the original circuit (this is where watts and amps come in), and determine if the new installation stays within the capacity of the original circuit.

    Be prepared to add a relay for the new lights.
     
    Last edited: Mar 1, 2023
  4. Mar 1, 2023 at 10:08 AM
    #4
    Jaxon.NW

    Jaxon.NW [OP] Active Member

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    How would I confirm the fuse size of the current circuit and new lights? Is that the AMP size, wattage, lumens?
     
  5. Mar 1, 2023 at 10:16 AM
    #5
    Clearwater Bill

    Clearwater Bill Never answer an anonymous letter

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    Look at the fuse that serves that circuit. Read the requirements of the new light. Call @memario1214, who will also have a light that should work well.
     
  6. Mar 1, 2023 at 10:26 AM
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    Jaxon.NW

    Jaxon.NW [OP] Active Member

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    I reached out to him. The Fuse is a 15amp. So the light bar cant draw on more than that? What if I just replaced the fuse with a 25amp?
     
  7. Mar 1, 2023 at 10:30 AM
    #7
    Clearwater Bill

    Clearwater Bill Never answer an anonymous letter

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    That's correct for that circuit. 15a is your limit.

    The fuse supports the wire size by blowing before burning up the wire under overload. Up-sizing fuses is a hazard.

    Does 'reach out' mean email? Call. It's easier to have an iterative conversation and get all your Q's answered than multiple emails or postings.
     
    memario1214 likes this.
  8. Mar 1, 2023 at 1:29 PM
    #8
    memario1214

    memario1214 Hotshot Offroad Moderator Vendor

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    Okay, @Jaxon.NW I got your message and will reply soon.

    However, for anyone else in your situation stumbling across this thread I want to toss in a little bit of an answer. Don't use your fog light wiring to directly power a 30" light bar. Some might have a low enough draw to where the OEM fog light wiring gauge can support it, but I can't recall the gauge off-hand. I wouldn't trust each lead for much more than about 5 amps per lead, and a quality 30" bar will draw around 10amps.

    Use a relay, and use the OEM fog light plug as your "switch". Pull the power from the battery.
     
    Steelhead Bum and TnShooter like this.
  9. Mar 2, 2023 at 9:11 AM
    #9
    caribe makaira

    caribe makaira Well-Known Member

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    Could use both wires. Match the connectors and add same length wire to meet the new light bar.
    upload_2023-3-2_13-8-40.jpgupload_2023-3-2_13-9-36.jpg
    upload_2023-3-2_13-10-19.jpg
     

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