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Thread: What's the difference between a 3157 and a 3457(inner turn bulb)?

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    Default What's the difference between a 3157 and a 3457(inner turn bulb)?

    The part store says I need a 3457, but I pull the oem(?) bulb out and it's a 3157, they look the same, is it ok to interchange the two?
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    3457 is maybe a higher wattage= higher heat= may melt plastic that it's not rated for.
    I was lookin at replacing my 3157 LED tails with 4157s to brighten up the niteshades. Dunno if it'll melt, tho.
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    Yeah thats what I'm afraid of doing so I figured I'd ask before I put those bitches in

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    3157:

    category: Miniature
    volt: 12.8 / 14
    amp: 2.1 / 0.59
    watt: 26.9 / 8.26
    base: W2.5x16q
    glass: S8
    filament: C6/C6
    fil.res.: 6.1 / 23.7 ohm
    m.o.l.: 2.09 inch (53MM)
    l.c.l.: 1.1 inch (27.9MM)
    burn pos: burn lamp in ANY position
    i.lumens: 402 / 37.7
    cp: 32 / 3
    cri: 99
    d.hours: 2000 / 10000

    notes:

    automobile lamp
    base:black nylon
    extended service (long life)
    code:hd
    code:ll
    krypton gas
    stop light lamp
    tail lamp


    3457:

    category: Miniature
    volt: 12.8 / 14
    amp: 2.23 / 0.59
    watt: 28.5 / 8.26
    base: W2.5x16q
    glass: S8
    filament: C6/C6
    fil.res.: 5.74 / 23.7 ohm
    m.o.l.: 2.09 inch (53MM)
    l.c.l.: 1.1 inch (27.9MM)
    i.lumens: 503 / 37.7
    cp: 40 / 3
    d.hours: 400 / 5000

    notes:

    Amodel base
    base:grey amodel
    code:hd
    specs verified against ANSI-SR25D1997
    stop light lamp
    tail lamp










    looks like 3457 has more lumens, more watts, etc. i remember thinking that 3157 was for Fords, and 3457 was for Chevy's. i do know that if you put a Chevy bulb in our cars, it will blow the fuses....been there, tried that.

    as far as LED's, though...i know most places have a 3157/3457 replacement that works in place of either...and will work in either application.
    Last edited by zxtwou2; 01-01-2009 at 10:20 PM.
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    yea they look exactly the same, I just don't want to have a bulb blow up and scatter shit everywhere in the housing(the ones i black'd already had lived thru that). I stuck 'em in tonight, they seem ok. Now at least they're legal

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    Did they seem brighter?

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    My understanding about them was the the wiring was different. There are 4 wires coming out at the bottom of the wedge, two on either side. From what I was always told, the wiring is different.. like the polarity and all are wired in different.

    Similar to 1157/1156s. they stop you from making that mistake with the little nubs on the base that are only supposed to let you put them in the right harness/pigtail.

    I have run both 3157 and 3457s with no problem. Its a trick with foil. I'll find the website and post the how-to.

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    ehh my trick was plug 'em in, they work for me, and doug yea they do seem brighter kind of, mostly because the blue ones i took out were so dim

  9. #9

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    Werd lemme know if you see any drippage on teh lenzsors!

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