Fogs light circuit run LEDs? - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > General Tech Forums > Off Road and External Lighting

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 05-21-2013, 07:57 AM   #1
Jeeper
 
Join Date: Nov 2012
Posts: 31
Fogs light circuit run LEDs?

I have purchased a Spyder Front Modular Hybrid Rock Crawler Winch Bumper and the Tuff Stuff Performance 12" Dual Row LED Off Road Light Bar that mounts inside the bumper. The current fog lights will hopefully fit into the new rear bumper's 4" openings.

Will the fog light circuit handle the current draw for the LED light bar?

The bumper will mount two additional lights. Are there other lights (LED or halogen) that could be run directly off the fog light circuit?

I am in Colorado. The local police seem a bit fussy about offroad lighting. Any other Colorado jeepers out there that know what lights we can use without getting pulled over for daily inspections?

Thanks,
Froggie

__________________
2012 JKU SaharICON, auto, dual tops, leather
Rubicon electronic sway bar disconnect, Rubicon 4.10 electric locker axles, Zone Nitro 3" lift w/nitro steering stabilizer, JKS adjustable front track bar, M/T MTZ 33s, Spyder hybrid front bumper w/built-in 12" LED light bar, HF 12,000# winch, Garvin rear bumper, swing spare tire w/tool mount, and over spare rack
Froglips is offline   Quote Quick Reply
Old 05-22-2013, 02:57 AM   #2
Jeeper
 
IcarusLSC's Avatar
 
Join Date: Aug 2012
Location: Ontario, Canada
Posts: 617
Use a relay to be safe. Trigger it from the fog lights.

__________________
·Ď˘ĺrµ§·
IcarusLSC is offline   Quote Quick Reply
Old 05-27-2013, 07:03 AM   #3
JSM
Newb
 
Join Date: May 2013
Posts: 2
Need some advise. ... Just installed two sets of Dually LED lights on my JK. Needed to extend the wires a little bit. Used 18 gauge speaker wire i had. Is this safe for this application ? The lines use a 15 AMP fuse. Thanks in advance for your help.
JSM is offline   Quote Quick Reply
Old 05-28-2013, 10:10 AM   #4
Jeeper
 
Join Date: Feb 2013
Location: Windsor Ont
Posts: 244
even understanding that the LED's draw less
jeep uses the thinnest wire possible
I would use this
Add a light 1 meter extension
2footin is offline   Quote Quick Reply
Old 05-30-2013, 08:06 PM   #5
Jeeper
 
BlueRidgeYJ's Avatar
 
Join Date: Mar 2012
Posts: 4,917
Quote:
Originally Posted by JSM View Post
Need some advise. ... Just installed two sets of Dually LED lights on my JK. Needed to extend the wires a little bit. Used 18 gauge speaker wire i had. Is this safe for this application ? The lines use a 15 AMP fuse. Thanks in advance for your help.
No. 18 gauge copper stranded wire on a 12V system typically has an ampacity not exceeding 10A. Speaker wire, unless high dollar OFC wire, probably carries a wee bit less, but marginally the same. Either way, 18 is too small. 16 carries 20A according to some, but I think 15A is its max. I would go with no smaller than 14ga for a 15A load, personally. Most 14ga stranded wire I have used has been marked at a 17A ampacity.
__________________
“Coming of age in a fascist police state will not be a barrel of fun for anybody, much less for people like me, who are not inclined to suffer Nazis gladly and feel only contempt for the cowardly flag-suckers who would gladly give up their outdated freedom to live for the mess of pottage they have been conned into believing will be freedom from fear.”
BlueRidgeYJ is offline   Quote Quick Reply
Old 05-30-2013, 09:44 PM   #6
GTJ
Jeeper
 
GTJ's Avatar
 
Join Date: Feb 2013
Posts: 311
Not knowing automotive wire sizes but I am a electrician and 14 AWG is rated for 15 amps 12AWG is rated for 20 amps is I agree I would run at least 14AWG for the lights - people feel that because it is just a car that any wire will work until that fated day when it catches fire
GTJ is offline   Quote Quick Reply
Old 06-01-2013, 09:06 AM   #7
Jeeper
 
Join Date: Nov 2012
Posts: 31
What can you run off the fog light circuit

Because I think less is more and I hate adding extra complexity if it isn't needed, I called several dealers until I found one that knew what the fog lights draw on a 2012 JKU Sahara.

Fog light current draw is 37 watts per light.

The LED light bar I am installing has 20 3 watt LEDs.

Just saying.
__________________
2012 JKU SaharICON, auto, dual tops, leather
Rubicon electronic sway bar disconnect, Rubicon 4.10 electric locker axles, Zone Nitro 3" lift w/nitro steering stabilizer, JKS adjustable front track bar, M/T MTZ 33s, Spyder hybrid front bumper w/built-in 12" LED light bar, HF 12,000# winch, Garvin rear bumper, swing spare tire w/tool mount, and over spare rack
Froglips is offline   Quote Quick Reply
Old 06-01-2013, 09:54 AM   #8
Jeeper
 
BlueRidgeYJ's Avatar
 
Join Date: Mar 2012
Posts: 4,917
If you are replacing the fogs and only using the bar, you're all good. 37W sounds right for a fog to me, and obviously 60 < 74.

If you are wanting to add more lights to the same circuit, like 2 more on the bumper, you are already adding complexity to the circuit and need to power it in a safe, reliable fashion. Keeping it on the factory fog light circuit is easily accomplished with a relay using the fog positive lead as a trigger. Otherwise, you'll be running much more amperage down the factory wires than intended. Well, unless you do ample research to find fogs that draw 14W or less, which even (good) LEDs will have trouble doing and even then you will still have brighter, better light using a direct path relay controlled.
__________________
“Coming of age in a fascist police state will not be a barrel of fun for anybody, much less for people like me, who are not inclined to suffer Nazis gladly and feel only contempt for the cowardly flag-suckers who would gladly give up their outdated freedom to live for the mess of pottage they have been conned into believing will be freedom from fear.”
BlueRidgeYJ is offline   Quote Quick Reply
Old 06-02-2013, 09:14 AM   #9
Jeeper
 
Join Date: Nov 2012
Posts: 31
Yea, I am planning to add a pair of 55w HIDs to the bar and those will absolutely be on a new circuit with 12 gauge wire, relay, and separate switch.

Running a wire from the fog light plugs all the way back to a relay then a wire back to the LED bar seems a bit overkill but your point about the incredible crappy OEM wiring is well taken. I wish I had a wiring harness diagram for the 2012 JK. If I could find the outgoing wire to the fog lights closer to the firewall then I could splice in a relay and just run 12 gauge wire down to the light bar.
__________________
2012 JKU SaharICON, auto, dual tops, leather
Rubicon electronic sway bar disconnect, Rubicon 4.10 electric locker axles, Zone Nitro 3" lift w/nitro steering stabilizer, JKS adjustable front track bar, M/T MTZ 33s, Spyder hybrid front bumper w/built-in 12" LED light bar, HF 12,000# winch, Garvin rear bumper, swing spare tire w/tool mount, and over spare rack
Froglips is offline   Quote Quick Reply
Old 06-02-2013, 10:06 AM   #10
Jeeper
 
BlueRidgeYJ's Avatar
 
Join Date: Mar 2012
Posts: 4,917
For sure, buying a new Jeep and slapping wires everywhere isn't winning any cool points.

Personally, I would add a fuse box for accessories, then add the relay to a position, then route both the wires through a singular wire loom to the fogs, assuming I couldn't locate the factory wire close to the battery or relay location and wanted to use a relay. I would also try to fit the 12ga going to my hids in the same loom, leaving a cleaner install.

I don't mean to imply you have to add anything on the light bar; you don't. As long as the other lights are independent, the bar will be satisfied with a healhy safety margin. You can always hook it up and see how it is, then install the hids later and change it at that time if you want to squeek a bit more light out.

Your Jeep, your call. To each his own, sir.
__________________
“Coming of age in a fascist police state will not be a barrel of fun for anybody, much less for people like me, who are not inclined to suffer Nazis gladly and feel only contempt for the cowardly flag-suckers who would gladly give up their outdated freedom to live for the mess of pottage they have been conned into believing will be freedom from fear.”
BlueRidgeYJ is offline   Quote Quick Reply
Old 06-03-2013, 08:57 PM   #11
Jeeper
 
Join Date: Mar 2013
Posts: 112
Quote:
Originally Posted by Froglips View Post

Running a wire from the fog light plugs all the way back to a relay then a wire back to the LED bar seems a bit overkill but your point about the incredible crappy OEM wiring is well taken. I wish I had a wiring harness diagram for the 2012 JK. If I could find the outgoing wire to the fog lights closer to the firewall then I could splice in a relay and just run 12 gauge wire down to the light bar.
TIPM C4 connector pin 11 WT/OR is rf fog lamp & pin 16 WT/YL is lf fog lamp. There isn't a relay for them, they are high side driver controlled thru the TIPM. Maybe that will help you.
__________________
ASE Certified Master Tech
Chrysler Certified Tech - bringing you info straight from the stealership on the cheap.
crawlin_archer is offline   Quote Quick Reply
Old 06-05-2013, 09:25 AM   #12
Jeeper
 
caprob's Avatar
 
Join Date: Jan 2013
Location: Offshore & Covington
Posts: 80
Crawlin Archer is sharp. "F" the lead fm the low beams

Quote:
Originally Posted by crawlin_archer View Post
TIPM C4 connector pin 11 WT/OR is rf fog lamp & pin 16 WT/YL is lf fog lamp. There isn't a relay for them, they are high side driver controlled thru the TIPM. Maybe that will help you.
The law states the fogs can't come on with the high beams so the relay is set up for the lead from the low beams. "F" that! I went directly to the battery to use the PIAA relay. I should have done what Archer is saying plus used my own clean small relay for the job. My LEDs on the A-pillar stay on 24/7 instead. No big deal though... I'm at sea for 28 days and it doesn't effect the battery what so ever, but I wish I had his info back when I wired it and had done it cleaner.

Hey Archer, How can I protect my TIPM from water damage when I run through rivers? What else do I need to protect?
__________________
Keep Calm Jeep On! Rob
______====
[ [][],[___
l--\|\| --OlllllllO-
())-o-())-o-))
caprob is offline   Quote Quick Reply
Old 06-08-2013, 07:49 PM   #13
Jeeper
 
Tweak's Avatar
 
Join Date: Jan 2013
Location: Keller, TX
Posts: 2,221
my buddy has been running some hella floods off of his fog circuit with no issues.

Tweak is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 03:02 AM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC