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post #1 of 11 Old 12-31-2013, 09:10 AM Thread Starter
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Question LED fog light question

I recently purchased a 14" dual row led light bar to replace my existing
fog lights on my 04' . The wiring that comes out of the light bar is huge
compared to the truck wiring ( harness ) . I'm wondering if the stock
pos and neg wires , stock switch ( pull out headlight ) will supply enough
current ? I know little about led lights - the unit says 72watt and I'm
assuming the stock lights were 55 watt ?
Any input would be nice Thank you
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post #2 of 11 Old 01-01-2014, 06:28 AM
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You'd probably be ok, even with it being a 72 watt system the actual amperage is going to be pretty low. I just went through this on mine, but the lights I added weren't LEDs so I had to upgrade the wiring and make my own harness.

Also, there actually is a fog light relay so the current doesn't flow through the switch. It's one of the non-serviceable relays and is part of the central junction box

FWIW, the calculator I use shows 12 volts running 72 watts will draw 6 amps.....that's less than your pair of stockers.

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post #3 of 11 Old 01-01-2014, 03:09 PM
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A harness and relay would be a good upgrade. Watts and amps need to be checked.


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post #4 of 11 Old 01-01-2014, 11:31 PM
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72 watts should be no problem!
The stock foglight bulbs are only around 27 watts each, but me and many others run the 9006 bulbs in our foglights which are 60 watts each with no problems.

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post #5 of 11 Old 01-02-2014, 06:34 AM Thread Starter
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Thanks for the input guys .
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post #6 of 11 Old 01-08-2014, 07:17 PM
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Check the recommended fused amperage for the new light bar.
Compare that to the OEM fog light fuse amps.
Thats probably your safest bet.

Watts dont burn up wires, amperage does.

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post #7 of 11 Old 01-12-2014, 03:23 PM
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Are y'all just taking out the 10amp fog light fuse in the fuse box and replacing it with a higher rated fuse or what?
Mine keeps on getting blown

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post #8 of 11 Old 01-12-2014, 03:45 PM
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If you're blowing fuses it might be time to upgrade your wiring....the lights are pulling too much power (or have a short somewhere) and that's killing your fuses. If you do go bigger, don't go bigger than a 15amp or you'll be in danger of melting your wiring.

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post #9 of 11 Old 01-12-2014, 04:01 PM
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Alright thank you. Its a 20in bar so I might just go ahead and hook it up to an up fitter switch.

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post #10 of 11 Old 01-12-2014, 06:19 PM
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Quote:
Originally Posted by BBWhiteDiesel View Post
Alright thank you. Its a 20in bar so I might just go ahead and hook it up to an up fitter switch.
Just run a relay, I've done a 20" light bar in my fog light spot on my last 2 trucks and never had a problem with the relay. I found the wire that turned the fogs on and used it as my relay turn on wire. Works great!

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