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Need info on wire size/gauges for accent lights

Discussion in 'Lighting' started by FY01CPO, Jul 6, 2011.

  1. Jul 6, 2011 at 12:15 PM

    FY01CPO [OP] Well-Known Member

    Jun 17, 2011
    First Name:
    SR5 4x4
    black tube steps, side marker turn signals, 15% tint and window strip, EGR vent shades, fighter pilot/cockpit mod, console and glove box auto on LED, anytime fog light mod, 3000k HID fogs, bed mat wing nut mod, locking bed storage bin mod, smoked tail lights, plasti-dipped rims, blacked out emblems, black tail pipe, tail gate hose clamp, rear seat utility/dog shelf with rear center console access door.
    Good afternoon, I have read a few threads on installing LEDs in the glove box, center console, footwells, and cup holder areas and am going to do this for my truck as well.

    The how-to's talk about using an inline fuse and one of the installs uses a mini blade inline fuse holder (Center Console/ Glove Box Light (auto on/off when opened)). The wire on the fuse holder is 12GA and the rest of the wires are 18GA. Is the fuse holder going to be able to work if a short circuit comes in or will the fuse holder wire create a lot of resistance for the electricity running through the wires? I think since there are a few wires running to the inline fuse that it might be ok but I don't want to falsely think that everything is working fine only to have an issue down the road. I tried looking for an inline fuse holder for 12VDC with 18GA wire while I was at Radio Shack but didn't see any. Do any of you wiring/electrical experts have any info to help me buy the right things?
  2. Jul 8, 2011 at 6:46 PM

    larryde09 Well-Known Member

    Jul 3, 2010
    First Name:
    Rochester, NY
    (Traded-in) 06 2.7L 5-spd SR5 4x4
    K&N Intake, Magnaflow Cat-back Exhaust, Altezza Tail Lights, Pop&Lock Tailgate Lock, Extang Trifecta Tonneau Cover, PIAA foglights with stock switch, DrawTite Hitch, OBX Shift Knob, Hood Protector, Vent Visors, DIY step bars/sliders/running boards, DIY Bed Lights, DIY Running Board/Ground Lights, DIY Tailgate Electrical Box (12V socket, voltage and current gauges), DIY Internal Lighting (coming soon), Aftermarket switches in stock dash blanks, Sony Head Unit, Illuminated 4x4 switch mod
    The size of the wire for the in-line fuse is not that big of a deal. What matters is the size of the fuse in the holder. Always pick a fuse sized to protect the smallest gauge wire. Note: wire gauge is numbered backwards...a 12 gauge wire is bigger than an 18 gauge wire and can therefore handle more current. Therefore, pick a fuse to protect the 18 gauge wire.

    Check out my electrical basics thread (link in my signature).

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