Last week I ordered some OEM fog lights for my 2008 F450 XLT from partsguyed. I recently heard he had health issues, I wish him all the best, but I do not want to bother emailing him at this time.

He did mention at first, the XLT is all wired for them? Although they wont be here till Wednesday, I looked under the truck today, and I cannot seem to find out where the wirning is that i will need to connect them to. Has anyone does this before? if so can you let me know where I wire it too?

Thanks

 

I have the same question on my 2005 F350, ghot thew lights, the auto lamp switch in my xlt super, but no wiring harness present where the fogs go. what did you find out?

 

Look Driver side near the front frame rail and inner fender well.
You may need to install the relay to get them working. You should see
2 wires in a jacket with a plug on the end. Before you plug in be sure to
use some contact cleaner on it to remove and dirt and corrosion. Then top
it off with some dielectric grease to keep is dry and clean.

Sean

 

Mine was easy, i found the wiring harness and it was plug and play! But I am not sure if it is the same on an 05, so I cannot comment since mine was on an 08.

 

I did mine on my 11, alot may have changed, but the plug for mine was in the center of the bumper, with a cap on it, tucked up behind. If your laying under the truck, its almost behind where you would think the license plate would be.
I also had to replace the switch for my lights on my dash, instead of twisting the switch for headlights, you also pull it out for fogs.

 

I have an 08 XL. I was told the connecting harness is to the left of the horn, on the drivers side. It has a dummy plug in the connector. So, far, I have replaced the head light switch with the one that pulls out for fog; however, when I remove the dummy plug and check for current with a test light, there is no current at the harness. What am I missing?

 

Some use a relay between the switch and the light. If it didn't come with fog lights perhaps the relay and fuse didn't get installed.

 

Most likely it is what
DarrellinCeres said.
Relay missing
I find it helpful to have a good wiring diagram
for the year and model being worked on.

Sean

 

Yep, I have to get the harness that runs between Fogs(L&R) and connects to the truck plug. guess I will go to the junk yard. thanks folks for the help.

 

Are you checking this with the key in the on position or the truck running? unlike the headlights which can turn on when the truck is off with no key in, the fog lights need the the truck to be in running or have the key in the on position in order for them to light up.

 

Can you tell me where the relay installs. my truck has the wiring, but no relay.

 

I have checked with the key in the on position and also checked with the engine running. still no current, and can't hear a relay. According to the fuse diagram, the fog lamp fuse is number 21, a 15 amp fuse which I did find; however, I have no idea as to where the relay is located. Any ideas?

 

I don't have a diagram for you year. Do you
have access to the owners manual? It should
show you where that relay is. On the 06 it's
in the CJB in the cab location 2.43.

Sean

 

if you are checking current without bulbs installed you probably blew the fuse on your multimeter or the pickup itself as you shorted the hot side to ground.

you should check voltage if you want to check anything. My '08 XL was plug & play.