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  1. #1

    Question 1995(earlier too)-1999 High and low on at same time.

    Has anyone out there ever figured out how to do this mod? I was thinking of buying a new set of headlight harnesses and adding a relay for low and high and then use a diode between them. The older trucks don't come from the factory with headlight relays so it makes everything difficult. I would leave the stock wires in place just incase the mod didn't work so that way it would be a really quick change back to stock.

    Any ideas any one?

    1996 Chevy Tahoe LT 5.7L V8 4X4 205,000+ miles. Built proudly at Janesville Assembly in Janesville, Wisconsin
    Basic mods: Lights all over, bunch of electrical work, and a couple cooling mods.

    Check out my other mods in My Garage:

  2. #2


    I found this. I don't know if it will work for your year truck

    Or this is $28 and says it will work on your truck.

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors,
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

  3. #3


    go on LMC truck's website I have seen a kit in their catalog before. not sure how much it costs

  4. #4


    They DO have kits at LMC, but they are just relays like I already have laying around. @Pikey what was done in that video won't work with 95 and up trucks because the headlight switch and bright switch are part of two separate systems in terms of connectors. The only place they meet it the headlight switch, but the lights would burn up the light power feed.

    If I only buy two sets of headlight wire harnesses it will cost me like $20 for the mod since I have the wire, relays and diode.

  5. #5


    There's some material for you (supplied as a response to a tag I made, there) in the Guess the Next Poster thread. It might or might not help. It's for 99-02 trucks ... which have the same kinda issue you do (no relays).

  6. #6


    I'm not sure if the 95-99/98 OBS trucks are set up like that.

    The pinout for the headlight switch is this:
    Pin Wire Color Description
    B Gray Courtesy Lamp
    C Red Battery Fused Feed
    D Pink Ignition Fused Feed
    E Dark Green Instrument Panel Lamps Dimmer Switch
    G Yellow Headlamp Switch Output
    H Orange Battery Fused Feed
    L Purple Interior Lamp Defeat Switch
    M White Courtesy Lamp
    N Purple w/ White Stripe LED Dimming Signal
    R Black Ground
    S Brown Park Lamp Feed

    The switch between the high and low is based in the wiper control lever. I was simply going to tap into the low and high factory wires and use those to control the relays, then using new headlight harnesses I would attach in the headlights switched via the relays. I could then just add a diode which I have laying around into the circuit. With having the aux fuse box I have the open terminals and if the system failed I could still use the factory headlight harnesses.

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  7. #7


    I have a GM electrical manual for a 1995 truck. If it is the same and you need a diagram, I can take some pics of it for you and post them.

  8. #8


    Not sure if it is, but hell why not my Hayes/Chilton manual only gives crude diagrams that are rarely helpful.

    I really want a full 1996 GM service manual for C/K trucks and Suvs. I found one on amazon, but it costs like $250-300...

    Oh, btw today I looked under the dash for my DRL components and my truck has all of them, but the DRLs don't work...

  9. #9


    I will try to get them posted in the morning. I have the GM service manual and the GM "driveability, emissions and electrical diagnostic" manual for 1995. I have a friend that worked at GM power train. He walked out of work one day and said that there was a dumpster full of manuals, this was in 1998. So, knowing that I had a 1995 he grabbed the two for me. I have to say that much of it was the same for my sister's 1998 tahoe. There were obvious differences like the fact that she had a vortec, but much of the accessory wiring was the same.

  10. #10


    Awesome. For some reason my driver door window won't go up or down any more. This happened once before but it only lasted a short while before it stopped being weird. Its been a week now and it's pissing me off. The switch clicks like its sending a signal but nothing happens no motor noise nothing. It seems to happen just as the weather gets nice and I begin to use the windows again.

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