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Thread: Fog Light Output Voltage

  1. #1
    Join Date
    Oct 2005
    Location
    Mesa
    Posts
    459

    Fog Light Output Voltage

    Hello Everyone,
    I am trying to hook up my L.E.D. Spotlights by wiring them to my fog light harness. I am using a relay, and everything works great until I start the engine. The relay starts buzzing, and only one set of lights begin flickering intermittently? The other lights stay on as they should? I checked the voltage of the fog light lead and it is just over 9 volts? Please help...
    2014 JKU

  2. #2
    Join Date
    Aug 2011
    Location
    Buckeye, Az
    Posts
    1,545

    Re: Fog Light Output Voltage

    Polarity wrong on one light?

  3. #3
    Join Date
    Oct 2005
    Location
    Mesa
    Posts
    459

    Re: Fog Light Output Voltage

    Ummmmmmm, probably not. They were working fine when I had them on a normal switch.
    2014 JKU

  4. #4
    Join Date
    May 2006
    Location
    Chandler
    Posts
    90

    Re: Fog Light Output Voltage

    Sounds like Day time running lights. 9v is about correct for drl. The chatting is caused by the pulse width modulation they use to reduce the voltage.

    Sent from my SM-T350 using Tapatalk
    Leonard Pennock (AD7AS)
    98 XJ, 5" lift, 30/44 Detroit locker

  5. #5
    Join Date
    Aug 2011
    Location
    Buckeye, Az
    Posts
    1,545

    Re: Fog Light Output Voltage

    Sounds like a jk problem. Lol. On my tj the led fog lights work great.

  6. #6
    Join Date
    Mar 2015
    Location
    Ahwatukee
    Posts
    155

    Re: Fog Light Output Voltage

    Yes it's a JK problem. Take a look at antiflicker harnesses on amazon. Or you could solder a small capacitor across the trigger side of the relay to hold it 'on' when the pulse goes away.

  7. #7
    Join Date
    Oct 2005
    Location
    Mesa
    Posts
    459

    Re: Fog Light Output Voltage

    Ok, I have tried capacitors and even a 9 volt relay and nothing is fixing this issue. There has got to be a way this has been done successfully???
    2014 JKU

  8. #8
    Join Date
    Mar 2015
    Location
    Ahwatukee
    Posts
    155

    Re: Fog Light Output Voltage

    If you want, you can come over and we can take a look at it.

  9. #9
    Join Date
    Oct 2005
    Location
    Mesa
    Posts
    459

    Re: Fog Light Output Voltage

    Ok ..... can you send me your info? Likely will not be until the weekend after next if that is ok?
    2014 JKU

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