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fog lights won't come on after frame swap

Discussion in 'Technical Chat' started by aptech, Oct 17, 2022.

  1. Oct 17, 2022 at 1:36 PM
    #1
    aptech

    aptech [OP] Jetfixer

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    toy teccoil overs 2.5 lift.600lb springs, allpro expedition leaf pack. cbi hybrid bumper, cbi slider,cbi rear bumper swing arm, roof rack ghostflames, sport hood, tsb steering, trd cai, red map lights, derp works custom platform for bed. backup cam any time mod, fog light any time mod. bed light mod. 400watt inverter mod. 2857516 dura tracs. beach sand intsall and a lot more shite
    I have a 2010 tacoma offroad TRD. with the fog light mod.
    it have tested for ground at the relay socket with factory light switch actuated.
    continuity comes in at 1.3 ohms.
    but when I turn the lights on the continuity changes to 44 ohms.
    I'm a bit perplexed
    thanks
     
  2. Oct 17, 2022 at 7:53 PM
    #2
    Dm93

    Dm93 Test Don't Guess

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    Predator tube steps, Ranch Hand grill guard, Magnaflow CatBack exhaust, Toyota tool box & bed mat, 2LO Module by @Up2NoGood, Rearview Compass/Temp Mirror, Tune by @JustDSM.
    The fog light circuit is very simple.
    Pin 1 of the FR FOG Relay gets power from the HEAD (LO RH) fuse 10A when the headlights are on low beam.
    Pin 2 of the FR FOG Relay gets ground from the Fog Light Switch to turn it on (Switch gets ground from ground point IC)
    Pin 5 of the FR FOG Relay gets constant power from the FR FOG Fuse 15A
    Pin 3 of the FR FOG Relay supplies power to the Fog Lights when the relay is turned on (Fog Lights get ground from ground points EA & EB)

    Using a test light is a far better way to test circuits than resistance testing, resistance testing is a waste of time IMO.

    2010 Fog Light Wiring.jpg

    2010 Engine Room Fuse Box.jpg

    2010 Interior Ground Points.jpg

    2010 4.0L Engine Bay Ground Points.jpg
     
  3. Oct 18, 2022 at 4:47 AM
    #3
    aptech

    aptech [OP] Jetfixer

    Joined:
    Apr 6, 2012
    Member:
    #76417
    Messages:
    3,197
    Gender:
    Male
    houston
    Vehicle:
    10 dc offroad
    toy teccoil overs 2.5 lift.600lb springs, allpro expedition leaf pack. cbi hybrid bumper, cbi slider,cbi rear bumper swing arm, roof rack ghostflames, sport hood, tsb steering, trd cai, red map lights, derp works custom platform for bed. backup cam any time mod, fog light any time mod. bed light mod. 400watt inverter mod. 2857516 dura tracs. beach sand intsall and a lot more shite
    I was just thinking I should test it with a load. I'll check it this wknd thanks

    the attachments are a great help.
     
    Last edited: Oct 18, 2022
  4. Oct 20, 2022 at 9:43 AM
    #4
    aptech

    aptech [OP] Jetfixer

    Joined:
    Apr 6, 2012
    Member:
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    Messages:
    3,197
    Gender:
    Male
    houston
    Vehicle:
    10 dc offroad
    toy teccoil overs 2.5 lift.600lb springs, allpro expedition leaf pack. cbi hybrid bumper, cbi slider,cbi rear bumper swing arm, roof rack ghostflames, sport hood, tsb steering, trd cai, red map lights, derp works custom platform for bed. backup cam any time mod, fog light any time mod. bed light mod. 400watt inverter mod. 2857516 dura tracs. beach sand intsall and a lot more shite
    update. found power to pig tail where i connect the lights with a test light. suspect the previous lights polarity was reversed from these new rigids. I'll test more this wknd.
     
    Last edited: Oct 20, 2022
    Dm93 likes this.
  5. Oct 21, 2022 at 5:42 PM
    #5
    aptech

    aptech [OP] Jetfixer

    Joined:
    Apr 6, 2012
    Member:
    #76417
    Messages:
    3,197
    Gender:
    Male
    houston
    Vehicle:
    10 dc offroad
    toy teccoil overs 2.5 lift.600lb springs, allpro expedition leaf pack. cbi hybrid bumper, cbi slider,cbi rear bumper swing arm, roof rack ghostflames, sport hood, tsb steering, trd cai, red map lights, derp works custom platform for bed. backup cam any time mod, fog light any time mod. bed light mod. 400watt inverter mod. 2857516 dura tracs. beach sand intsall and a lot more shite
    update rewired connecting harness and all works well. that's for the help
     
    Dm93 likes this.

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