389 Light wiring on 379

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Chevyho, Aug 24, 2014.

  1. Chevyho

    Chevyho Medium Load Member

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    Putting 389 headlights on my 379, dont ask why.. I like seeing at night.. But anyways the 389 lights have 8 wires, the 379 lights have 6 wires.. Cant find schematics anywhere can anyone help me.
     
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  3. Chevyho

    Chevyho Medium Load Member

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    Any help or tips would be greatly appreciated
     
  4. Tmtbob

    Tmtbob Medium Load Member

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    Try getting a vin off a 389 and going to the dealer for a printout
     
  5. Alberta-Mechanic

    Alberta-Mechanic Light Load Member

    Turn truck on test which wires have power low beam power high beam and grounds bud there coulors . Is the light you want to install in a housing and what coulors are the wires are the coulors for left head light different from right head. Tell me that and maybe I can help.
     
  6. bowtielml

    bowtielml Bobtail Member

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    i just bought a set of take offs from my dealer was if you have any tips chevyho 6 wires to 8 and did you cut the middle stud off or drill cowl as 379 has 5 studs some help would be appreciated thanks
     
  7. Chevyho

    Chevyho Medium Load Member

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    I drilled another hole, if i remember right the 389s had more ground wires, wire them together then to 379 harness. Use a volt meter. Sorry it was a long time ago cant remember colors.
     
  8. bowtielml

    bowtielml Bobtail Member

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    Thanks for the reply I got all lights to work on the bench test but can't figure out where the two extra wires for the led strip on the top of light go.does that strip signal as well and do you like the lights. Without measuring I assume the other studs fit just drill the one I really thank you for the help will be installing on weekend
     
  9. Chevyho

    Chevyho Medium Load Member

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    The led strip does not signal.. Comes on with marker lights, i believe mine was tied in with marker lights wire. Everything lines up except yah have to drill one hole for the extra stud. I find them to be a vast improvment over stock 379 headlights. View attachment 83602
     
  10. bowtielml

    bowtielml Bobtail Member

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    Thanks fellow Canuck chevyho got it figured out put 2 blacks together and led strip to cl now u got 6 wires and again tks makes the job real easy now I'm in ont. hour north of toronto
     
  11. Chevyho

    Chevyho Medium Load Member

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    No problem, let me know if u have any probs.
     
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