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Old 10-19-2014, 03:12 PM #1
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Warn Backup Lights - Trailer Power ?

Hi All,
First off, I have searched but could not find an answer. I note that in the fuse box there is a 30 amp circuit labeled "trailer"

Can I attach two 100Watt Warn Fog lights as backup lights using the Reverse Power off my 7-pin trailer attachment? Does it matter if I wire them serially or in parallel?

Thanks
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Old 10-19-2014, 06:54 PM #2
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200w would be almost 17amp. I personally would run a dedicated switched circuit so it could be turned off. Do you really want all that light every time you are in reverse? Why not just go for some small LEDs back there?
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Old 10-19-2014, 07:50 PM #3
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I also have a relay I can install to make it selective. Based on using the relay with remote, which wire in the trailer harness is always on?
Charley
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Old 10-19-2014, 08:08 PM #4
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Quote:
Originally Posted by rlinger View Post

"...I note that in the fuse box there is a 30 amp circuit labeled "trailer". Can I attach two 100Watt Warn Fog lights as backup lights using the Reverse Power off my 7-pin trailer attachment? Does it matter if I wire them serially or in parallel?"

Thanks
Hi rlinger,

If you do decided to do it that way you can get away with it, but like @Mace stated, that's 17 amps that you will impose on that circuit alone; plus the brake/stop, back-up, tail, and directional signal lamps will consume their fair share of the 30A budget... would you really want to place that much extra load on that electrical branch? A simple rly would accommodate that utility using only 0.5 to about 1.0 amp; ...problem solved!

Oh, should you decide to run those foglights in 'series', you know that if one bulb goes out the other will go out as well... probably not the best idea, parallel is likely your best option. rgds!
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Old 10-19-2014, 08:10 PM #5
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I also have a relay I can install to make it selective. Based on using the relay with remote, which wire in the trailer harness is always on?
Charley
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Old 10-19-2014, 08:13 PM #6
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Parallel will give full power to each light. Wiring them in series will reduce the current to half and the light output may be less that half.
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Old 10-19-2014, 10:33 PM #7
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@rlinger ,
I was just making connections to my trailer back-up lights circuit for a pair of 18W LED's this PM.

Just because you have a 30A Fuse under the hood, that's only part of your circuit, if it's like mine.
There should be a Fuse Panel with a 10A Low Profile Mini Fuse under the dash to the right of the driver's side kick panel that says TOWING BKUP. << (terminology corrected)
So your circuit will be overloaded if you tie directly to that with 2) 100W lights!


Your best bet would be as mentioned above....dedicated 12V Power from battery, relay, relay trigger from back-up light circuit and possibly a switch (in the trigger wire) to isolate when you don't really need 200W of light.

Check you fuse panel to make sure yours is the same, it may be different than mine.
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Last edited by Saker; 10-20-2014 at 02:19 PM. Reason: terminology corrected
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Old 10-23-2014, 10:37 PM #8
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Thanks everyone. I originally had them hanging from the rear bumper but now I am rethinking that given the change in clearance. I may just put them behind the front grill and just call it a day (or are there better places to mount them for rear backup lighting?)
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Old 10-23-2014, 11:07 PM #9
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I have been running the lower profile aux reverse lights like some of the members have just done for about two years. While I haven't ripped them off I have dragged them just about every time off road. Depending on the shape of them and how far they hang down there is a good chance of ripping them off. If you have a rack, up top would be a good spot to mount them. Also I think I remember seeing a flush mount rigid dually in the rear bumper if you aren't opposed to doing some cutting.
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Old 10-23-2014, 11:22 PM #10
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@rlinger

This is what I did....
Wired to the TOWING BKUP light circuit.

Purchased from ebay: 18w 6INCH LED WORK LIGHT BAR FLOOD

They make a huge difference at night looking thru tinted windows and also lots of light when looking at BU camera!
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Old 10-24-2014, 12:44 AM #11
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Quote:
Originally Posted by Saker View Post
@rlinger



This is what I did....

Wired to the TOWING BKUP light circuit.



Purchased from ebay: 18w 6INCH LED WORK LIGHT BAR FLOOD



They make a huge difference at night looking thru tinted windows and also lots of light when looking at BU camera!


That's the setup I've been running and dragging offroad. I'm sure anything lower would have been ripped off.
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Old 10-24-2014, 12:54 AM #12
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Quote:
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That's the setup I've been running and dragging offroad. I'm sure anything lower would have been ripped off.
Dang, I'm just now realizing that my safety chain rings were not at 45 degree angles at some point.
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Old 04-12-2015, 09:17 PM #13
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Quote:
Originally Posted by Saker View Post
@rlinger

This is what I did....
Wired to the TOWING BKUP light circuit.

Purchased from ebay: 18w 6INCH LED WORK LIGHT BAR FLOOD

They make a huge difference at night looking thru tinted windows and also lots of light when looking at BU camera!
@Saker If you have any pictures of this install that would greatly help
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Old 04-12-2015, 10:24 PM #14
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Quote:
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@Saker If you have any pictures of this install that would greatly help
@cd121082 ,

No photos of the install. The lights are mounted to the bolts on either side of the hitch. I Found the backup light circuit and the ground on the 7-pin trailer attachment, unplugged, unbolted it & removed it. Found the wires going to the proper pins and tied into the wiring to each, ran my wiring to each light and mounted my lights.
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Old 05-06-2015, 05:37 PM #15
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Quote:
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@cd121082 ,

No photos of the install. The lights are mounted to the bolts on either side of the hitch. I Found the backup light circuit and the ground on the 7-pin trailer attachment, unplugged, unbolted it & removed it. Found the wires going to the proper pins and tied into the wiring to each, ran my wiring to each light and mounted my lights.
Will this mess up my harness for when I do tow?
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