wiring offroad lights with stock foglight harness? - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 03-09-2012
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wiring offroad lights with stock foglight harness?

can you hook up some offroad light using the stock wiring and have them work just like the stock foglights
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Old 03-09-2012
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Yeeeeesssss !

THE OEM Harness is Ground Sw’d BUT you can take the OEM Fog Light wire and use it to actuate a relay for the Add-On Lights.

OR

Chk out Bugmann’s Harness (this site) that actually replaces the OEM Stuff.

Last edited by Scrambler82; 03-09-2012 at 04:54 PM.
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Old 03-09-2012
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yep. use it to power up a relay, to run lights. (or anything)
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Old 03-09-2012
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any instruction i have no clue about wiring stuff
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Old 03-09-2012
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https://www.ranger-forums.com/interior-exterior-electrical-123/how-aux-light-hookup-indicator-light-105901/

Run the OEM Fog Light Wire to pin 85

Add a new fused power wire from battery to pin 30

Pin 87 is power to lights

[IMG][/IMG]
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wiring offroad lights with stock foglight harness?-_auxlightschematic-pinno87aamperageinfo.jpg  
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Old 03-09-2012
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dang u cant just cut the plug off and wire the light to it?
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Old 03-09-2012
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You could but you would rather run the power thru a relay. It will handle more power than the switch alone.
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Old 03-09-2012
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if you done use a relay you risk having your truck light on fire. pay the extra 6 bucks and get a relay it can save you thousands of dollars. do it right the first time so you dont have to go back and re do it.
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Old 03-09-2012
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What wattage are the new lights ?
AND, Do you want to of it right the first time ?

If the new lights are 35 watts apiece or less then you should be able to use the OEM wiring but if they are more than that then you really should use a relay to control the main power to the new lights.

With a separate relay the lights will burn brighter and last longer.
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Old 03-10-2012
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The stock fog light harness should be good for 55 watts a side, as that is what my truck came with.
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Quote:
Originally Posted by Blhde View Post
The stock fog light harness should be good for 55 watts a side, as that is what my truck came with.
Blhde ,
I was trying to play it safe.
A lot of people would connect 100w lights and not think twice.

Quote:
Originally Posted by j_huhnke View Post
can you hook up some offroad light using the stock wiring and have them work just like the stock foglights
j_huhnke,
I should have asked this before, what are you trying to do; aftermarket Fogs or other aux lighting ?
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Old 03-10-2012
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Just an FYI…The stock fog lamp wiring on a 2001 is 18g. The maximum AWG rating for chassis harness application is 16 amps. The fog lamp fuse is rated at 15 amps.

The factory lamps are 55w each. So in total the circuit pulls roughly 9.1 amps. Adding a second pair of standard off road or fog/driving lights rated at 55w each would add another 9+ amps to this circuit for a total of 18+ amps. This would exceed both the fuse and wiring maximum rating for this circuit.
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Old 03-10-2012
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I totally missed 2 sets on one circuit, the answer is NO.

Either replace the lights or run a new wire.
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Old 03-11-2012
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I didn’t see two lights on one circuit, j_huhnke just wanted to make the new lights operate the same way.


j_huhnke, what are you trying to do exactly, so we can get our $h!t together ?
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Old 03-12-2012
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i have a set of 6 in kc daylighters i put in the bumper and the box says 100 watts. idk if thats per light or not i just used the regular wiring it came with to hook them up and it doesnt have a relay in them but it does have a fuse. and i was wondering i have those and a smaller set of kcs i think were like 55 watt can i hook them both to one switch?
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Old 03-12-2012
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that would be 100w each.. you will want to use a new harness, i melted stuff putting in 100w bulbs in my stock fogs
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Old 03-12-2012
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The stock fog harness will run 2 55 watt lights, no more.

KC has wiring kits to run 2 lamps, you will need 3 to fire up all those lamps.
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Old 03-12-2012
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Quote:
Originally Posted by j_huhnke View Post
i have a set of 6 in kc daylighters i put in the bumper and the box says 100 watts. idk if thats per light or not i just used the regular wiring it came with to hook them up and it doesnt have a relay in them but it does have a fuse. and i was wondering i have those and a smaller set of kcs i think were like 55 watt can i hook them both to one switch?
YOU ARE ASKING FOR TROUBLE RUNNING 17 AMPS OF CURRENT WITHOUT A RELAY !

AND, NO !, to adding more lights to the same circuit but YES !, to all four lights on one switch.

200 watts / 12 volts = 16.66 amps, that is a lot of amperage,
If I am correct all KC Day Lighters 150 w or the 100w units if sold in a pair pack have a relay in the harness, if you purchased new check with KC.

The another 9 amps for the two 55w lights… adding 9 more amps to a 17 amp circuit without a relay is a setup for a possible fire.

IMHO… Start again with the light wiring, add a relay to the 200 watt light circuit and a new fused direct power wire from the battery. this will give you brighter lights and longer lasting lights.
Then add another circuit for the two smaller lights, with its own relay BUT you can use the same switch to activate them; just jump from pin 85 on one relay to pin 85 on the next one and all will work OK.

Follow this How-To and you will have no problem with over heated wiring:

Remember 2 Lights per circuit, per Relay is the std rule,
IF you increase the wire gauge, the rating of the fuse and the Relay then you could run more lighting but why.

https://www.ranger-forums.com/showthread.php?t=105901

Look at the schematic above posted for a quick wiring setup.

This sounds like i am preaching but believe me over heated wiring and sockets WILL lead to a fire, might not be tonight but if left on long enough it will !

Last edited by Scrambler82; 03-12-2012 at 05:54 PM.
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  #19  
Old 03-12-2012
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this is the wiring i have now for both sets of light can i just add in a relay to that?
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wiring offroad lights with stock foglight harness?-wiring-diagram.jpg  
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  #20  
Old 03-12-2012
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As it stands you are powering everything by that one switch. Which is fine for two lights you will need to upgrade every thing in that kit. As it is not capable of expansion. S

You can mirror that setup if you up the wire size, or you can add more switch kits for each light set. So every set will have its own switch.
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  #21  
Old 03-12-2012
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well its not both sets of lights on that one wire set up i have both sets wired seperately like that diagram shows
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  #22  
Old 03-12-2012
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Quote:
Originally Posted by j_huhnke View Post
i have a set of 6 in kc daylighters i put in the bumper and the box says 100 watts. idk if thats per light or not i just used the regular wiring it came with to hook them up and it doesnt have a relay in them but it does have a fuse. and i was wondering i have those and a smaller set of kcs i think were like 55 watt can i hook them both to one switch?
my buddy james just bought the SAME lights.... i reran all his wire.
i used 12gauge wire for the whole circuit....

i went power to fuse.
fuse to switch
switch to lights
lights to ground

he hasnt had any problems with the way its wired at all non of the wire even gets hot and most of them are running in the engine bay....

i believe this way is just fine. if the the kit requires a relay it would have come with on
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Old 03-12-2012
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the reason it does NOT include a relay is because all of that was meant to handle the current drawn by those two lights. however, if you are using the fog light wiring as the trigger for the lights, then you would want a relay. IF you are just running them with the included switch, and get your power straight from the battery then you wouldn't need a relay.
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  #24  
Old 03-12-2012
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ok so im all good i sure appreciate the help guys
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