16w cube leds into stock fog harness... - JeepForum.com
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Unread 04-04-2015, 01:21 AM   #1
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2013 JK Wrangler 
Join Date: Feb 2013
Location: Dededo, GU
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16w cube leds into stock fog harness...

These lights have become the bane of my existence over the past few months. The original wiring harness failed me somehow, after 6 months. Because the fuse kept blowing I assumed it was a short, but a visual inspection showed me nothing. (theres a thread somewhere) I gave up on the entire harness, thinking it would be easier to wire into the stock fog harness.

I ended up clipping the stock harness end and tying the wires in. black to black, red to white. this is before the blue wire is spliced in. it still doesnt work, and all threads ive seen are no help, because i understand none of them. what am i still doing wrong? 16w is definitely under the 55w canbus limit... ill try to get a pic up but im at my wits end with this ****

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Unread 04-06-2015, 10:46 AM   #2
02 Grand
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Don't know specifically what's going wrong, but I think you could save yourself a lot of frustration with a $20 relay kit. The fog circuit would just be powering the relay and the lights would get power direct from the battery. That takes all the weak point out of the mix.
Now: '15 JKU Rubi
In the past: 05 WK, 02 WJ, 11 JKU
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Unread 04-06-2015, 11:20 AM   #3
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Nothing magic about this. Confirm you have power & ground at the stock harness wires, mark or note which is which. Then confirm sane on the LED. Match pos to pos, Neg to neg. Beaus to solder & heat shrink the individual wires, then protect the harness with conduit. Be sure to match the fuse rating with the LED manufacturers recommendation, not the factory fog light rating. If it's still blowing fuses you have a short or arc somewhere.
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Unread 04-06-2015, 11:26 AM   #4
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The stock fog lights are CANBUS wires. Some guys have been successful with tapping the power to control a relay. But some still get flickering. I, personally, would not tap into a CANBUS wire. For the very reason you're experiencing. And LEDs are directional, hook them up backward and nada. Afterall, they are diodes.
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Unread 04-06-2015, 04:22 PM   #5
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The black wire on most LEDs is the +12V lead wire and white is ground. It would have been nice if the LED light industry followed the red =12V and black = ground.
Ah, how beautifully the orchestra sounds before a rain! In a dry sunny day there is no way for the instruments to sound this way!
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