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Old 06-09-2013, 01:52 PM   #1
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One kc fog light working

wired my new 100w kc fog lights today and wired them the exact way I wired my windshield mounted kc daylighter driving lights several months ago, (with kc supplied relay and harness). One fog light does not burn. Any suggestions? I plugged non burning light into other harness and it burns so bulb is good. I swapped my relay on day lighters and one fog still didn't burn so its not the relay. Can't be plug on light because it worked on other harness. Has to be wire from relay on the non burning light passenger side? I'm stumped. Help is appreciated

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Old 06-09-2013, 02:51 PM   #2
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Originally Posted by Newtomejeep View Post
wired my new 100w kc fog lights today and wired them the exact way I wired my windshield mounted kc daylighter driving lights several months ago, (with kc supplied relay and harness). One fog light does not burn. Any suggestions? I plugged non burning light into other harness and it burns so bulb is good. I swapped my relay on day lighters and one fog still didn't burn so its not the relay. Can't be plug on light because it worked on other harness. Has to be wire from relay on the non burning light passenger side? I'm stumped. Help is appreciated
I'd guess the ground on the nonworking bulb is bad. Or a bad relay if your ground stays the same when you switch over to the other "harness"

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Old 06-09-2013, 03:39 PM   #3
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Old 06-09-2013, 03:52 PM   #4
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This is gonna sound dumb, but maybe the bulb is bad? Burned out.
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Old 06-09-2013, 04:02 PM   #5
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Take a meter and check for continuity between your ground (i.e. the screw in the picture) and some other ground on the vehicle, like a big chunk of unpainted metal on the engine, or the negative terminal of the battery. While you may be grounded by virtue of the screw threads, it's also possible that you're not because most of that connector is touching paint.
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Old 06-09-2013, 04:10 PM   #6
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Take a meter and check for continuity between your ground (i.e. the screw in the picture) and some other ground on the vehicle, like a big chunk of unpainted metal on the engine, or the negative terminal of the battery. While you may be grounded by virtue of the screw threads, it's also possible that you're not because most of that connector is touching paint.
I originally had it to negative terminal of battery and decided to use same ground as daylighters but still didn't work. My daylighters work fine
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Old 06-09-2013, 04:10 PM   #7
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I know the bulb works because I used driver side harness and it burns fine


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Old 06-09-2013, 06:09 PM   #8
Knows a couple things...

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If you're getting 12 volts to the light that isn't working, it has a bad ground.
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Old 06-09-2013, 07:09 PM   #9
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Is this a factory fog light plug and if so can I use it with my kc's?

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Old 06-09-2013, 07:21 PM   #10
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I would not use the OEM wiring to power the lights you have because they will most likely overheat the factory wiring. You can use it to trigger relays to power the lights.
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Old 06-09-2013, 07:56 PM   #11
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1.) open the defective fog light

2.) check for loose or missing connections.
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Old 06-09-2013, 09:06 PM   #12
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But he said it works when plugged into the side that works so it must be the harness.
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Old 06-09-2013, 09:26 PM   #13
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But he said it works when plugged into the side that works so it must be the harness.
Yep it definitely works when plugged into other harness. I gave up tonight
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Old 06-09-2013, 09:47 PM   #14
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But he said it works when plugged into the side that works so it must be the harness.
That's what I originally thought he said, so I said he's got a bad relay or bad harness.
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Old 06-09-2013, 11:06 PM   #15
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Do you have +12V at the plug?
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Old 06-10-2013, 01:51 AM   #16
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Quote:
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If you're getting 12 volts to the light that isn't working, it has a bad ground.
X1000 sounds like a bad ground for sure
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Old 06-10-2013, 05:08 AM   #17
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I think he does not have the tools nor know how to test the wiring for power.
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Old 06-10-2013, 07:53 AM   #18
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Have to tools but obviously not the know how, thus the questions being asked. The daylighters , I installed without one hiccup. I got to work and cut wires to narrow it down to the harness plug where it plugs into light. Took plastic plug completely apart and the black wire was not properly seated inside the plastic harness frame. Problem solved and thanks or the opinions, ideas, and help. I'm an idiot but I try...
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Old 06-10-2013, 08:18 AM   #19
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X1000 sounds like a bad ground for sure
What drove me crazy is when I put volt meter into the plug with fog switch on, I was getting power. Apparently the meter probes stuck far enough into housing to make contact. Anyway it is finished. Thanks for input, I appreciate all the help I can get.

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