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Totally noob question regarding LED bar wiring with a relay

Discussion in 'Lighting' started by Cthulhu, Sep 20, 2018.

  1. Sep 20, 2018 at 4:01 PM
    #1
    Cthulhu

    Cthulhu [OP] Executive Redneck

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    Please be kind in responding to this ignorant question!! This is my first attempt at installing an LED light bar, which came with no instructions.

    It came with an on/off switch. There are three wires coming from the relay going into the three-pin switch. I’m assuming one is ground, another is the 12v, and I’m not sure what the other is for.

    I have a two-pin rocker switch that’s the exact same style that @TundraTex sends with his FRAC harness. My question is can I use it instead of the three-pin switch that came with the LED light bar, so the switch style is the same as my other two switches I already have installed from the FRAC harness? If so, how would I wire it? I’m assuming the ground would be attached to one pin. Would I combine and attach the other two wires to the other pin, or only attach the 12v wire and leave the other one “dangling”? I just don’t want to wire it improperly and destroy the universe!

    Thanks in advance for any help!
     
  2. Sep 20, 2018 at 4:49 PM
    #2
    831Tun

    831Tun crazy Bastrd

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    The 3rd wire is to illuminate the switch. Yes, you can use the 2 pin, obviously w/o the 3rd wire it won't be illuminated. The 3rd wire is disregarded and capped off, not hooked to power.
     
  3. Sep 20, 2018 at 5:07 PM
    #3
    Cthulhu

    Cthulhu [OP] Executive Redneck

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    Ahhhh...thank you SO MUCH!!! Makes total sense since the switch that came with the LED bar has green and red lights for “on/off”.
     
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  4. Sep 20, 2018 at 6:50 PM
    #4
    831Tun

    831Tun crazy Bastrd

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    Glad to help!
     
  5. Sep 20, 2018 at 6:58 PM
    #5
    NewImprovedRon

    NewImprovedRon Hey! Get off my grass!

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    Deck rail system, Bed divider, door sill protectors, LED reverse light bars, Aries Bull Bar with 28" 180 watt LED light bar, LED step lights, LED bed lights, driver-side grab handle, TRD Rear Sway Bar, BedRug bed mat and tailgate mat, Morimoto Fog Lights, more to come.....
    Just my $.02's but I would get an OEM type switch that is back lit when you turn on your headlights and lights with more intensity when your light bar is turned on. Here is how I did mine a couple of years ago...:
     

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  6. Sep 20, 2018 at 7:35 PM
    #6
    Stumpjumper

    Stumpjumper New Member

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    +1, I have the MicTuning. AirNb makes on too. I also had the MicTunings in Tacoma. Mine is mounted left of steering wheel. Pic is just with dash lights on. My light bars came with switches but too big to fit Tundra openings so they sit unused.

    WP_20180101_19_29_00_Pro.jpg
     
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  7. Sep 21, 2018 at 6:18 AM
    #7
    Cthulhu

    Cthulhu [OP] Executive Redneck

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    Thanks friends! These are great suggestions. A few years down the road when I really start sinking money on mods (like I haven't already LOL), I definitely want more LEDs with an illuminated switch set-up for my hunts, and will definitely seek more advice then. For now, this non-illuminated black switch will do the trick, and I'm going to mount it on the "ledge" like the FRAC switches. You can't even see the switches in that location, but having them all one type will still be "aesthetically pleasing" and satisfy my OCD LOL. I'm going to post the LED light bar on the "What have you done" thread once I get it all installed this weekend.

    Again, much appreciated!!
     
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  8. Sep 23, 2018 at 8:18 AM
    #8
    Cthulhu

    Cthulhu [OP] Executive Redneck

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    One thing I did find out when I started looking more closely at the wiring of the two-pin switch is the ground wire is the one not used, for anyone possibly running into this same scenario...might be common sense for some, but I just about used the ground wire on the two-pin switch, which would be akin to touching a positive and negative wire together. NO BUENO BRO!

    :violent:
     
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  9. Sep 23, 2018 at 8:55 AM
    #9
    831Tun

    831Tun crazy Bastrd

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    So, did ya get it working?
     
  10. Sep 23, 2018 at 9:51 AM
    #10
    Cthulhu

    Cthulhu [OP] Executive Redneck

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    Sure did! I did a couple of other things to the Tundra this weekend, nothing compared to the other mods I’ve seen on this site, but I’ll post ‘em to the “What have you done” thread later today nonetheless.
     
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