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  1. #1
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    Fog Light Resistor ohms and watts

    Hi, i changed my bumper and got rid of fogs. I want to stop the error from showing so what is the right resistor ohms and watts for it please. Thanks

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  3. #2
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    Anyone .... any ideas please?

  4. #3
    Woorlord's Avatar
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    Power (Watts) = I x V or V x V / R

    Or

    R = V x V / P

    So to directly replace the bulb use R= 12 x 12 / 55 = 2.618 Ohms and I would double the resistor wattage at least as it will be very hot, so at least 100 Watts. Going to be big!
    2001 A4 Saloon 3.0 Quattro Sport Tiptronic - Platinum Leather/Heated Front Seats/BOSE/DIS/Cruise Control
    Retrofits:GmBH Bumpers, F&R Ambient LEDS, OEM Valeo Xenons (D2S) & Headlight Washers, Auto-dipping RVM, Footwell Lights, Vent Control illumination, ISO-Fix, RNS-E & OEM Bluetooth + VIMhack + Video i-pod & Aux inputs, Rear PDC, Powerflow 100mm Tips, Reversing Camera
    2012 A4 Saloon 2.0 TDIe Technik (163ps)
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  5. #4
    1st Gear

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    Do be careful fitting resistors to dissipate that kind of power, as Woorlord just said it will get Very hot, they generally derate as the temperature rises also, 100 deg could easily derate by 50%..

    If you do do it, consider disconnecting the fog light control wire from the light switch, so the fogs cannot be turned on, but the car still sees them as connected..
    Mark

    2001 A4 TDI 130 SE, takes me to work
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    and gives you neck ache, and isn't for sale anymore...
    1949 Ferguson TED20, moves things that I can't move
    1959 Massey Ferguson 35 TVO, thats two ticked off the list...
    Lucky the good lady likes tractors...

  6. #5
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    something like this ... ?
    Click on link

    100W Watt 2.7 Ohm 5% Aluminum Case Power Wirewound Resistor | eBay

    Thanks

 

 

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