I started to work last night and didn't have any low beams. I have bright but no low. ( I have the wiring harness that wires to the battery for the 07 lights) It has done this several times in the last few months,I was thinking maybe the light switch, since it would come back on, but this time it didn't come back on. When you turn the lights on(low beam) there is a relay clicking on the lower part of the passenger side kick panel. I very rarely use my high beams,so I kinda rule that to be the dimmer switch. How would I figure out if its the Light Switch or the do I focus more on the relay. Any ideas?

 

Could be the low beam relay on the add-on harness
The low beams are fused but I can't imagine blowing the right and left fuses at the same time

 

I agree Ray. It does sound like a bum relay. Scott I have a bunch of those relays of you need one I can send one to you. You can swap out the relays so that your low beams will work.

 

^^^^^^^^^X2 on that bum relay !!!

 

You can pull the relay and jumper the low beam contacts, the lights should come on if you have a good fuse and good lamps and good voltage.

 

All of the aftermarket relay harnesses that I have seen use two relays - one for high beams and one for low beams. Ford separated the low beam harness so that each side would be fused separately, so you could at least have one low beam to get home.

I made my own harness with three relays - one high beam and two low beams. I also used three fuses. This kept the safety factor that Ford designed in.

 

Boy do I have a story for you, so keep this story in mind when you go out to check your lights...

So I'm driving my little sedan out to a friend's house one evening to pickup the kiddos, cruising down the hwy and went to pass a slow moving car, hit a bump in the road at the same time I hit my high beams while passing and my headlights went out. At first I wasn't quite sure they went out until I finished passing and then I thought, "wow, it's awful dark in front of me". So I kicked on the low beams and it got bright! At this point I started going back and forth between low beam and high beams and realized that my high beams were completely out.
So down the hwy I went, no high beams, waiting to get to the next gas station.
When I stopped at the gas station (which by the way was closed) I checked my fuses, they were working just fine, I checked connections, everything was plugged in and I was a bit stumped. I thought to myself, "There is no way both went out at the same time, both couldn't have burnt out" but I checked one of the bulbs anyhow and sure as the sky is blue the bulb I pulled out had a broken filament if you can believe that crap!

Moral of this story is don't rule out the bulbs, stranger things have happened than 2 filaments blowing at the same time

 

I drove the wifes car to work last night,as soon as the sun comes up, I will go out and check the relays first since it did go out several times before. If thats what it is, will swing by Autozone after I take the rugrat to school and pick up a couple. Thanks guys, this kinda had me stumped,but then again anything electrical stumps me pretty easy.

 

Well after alot of running this morning and about 80.00 wasted on new lights,used switch and Orielly's letting me test relays it turned out to be the connection after the fusible link . It had corroded and the wire in the connection had came loose. So I just cut it,put my own fuse in it. I have lights again. I think if I had it to do over again, I would have just bought the pigtails and not the harness....Grrrrrrr

 

Nice Job, Glade you got it fixed.

 

Thanks for posting back, good to know.
I take it that this is a wire on the back of the fuse block?

 

no, its a wire that came with the harness for the upgrade. It had a T shape connector that unplugs at the fusible link. That is where the wire came apart. Would have taken pictures,but I was fighting sleep so when I got finished,I went to bed...lol

 

ahh, ok. Well thanks for posting back and glad it is all fixed now. After all a guy shouldn't be without his truck

 

I have a stock 2005 F250 witht eh factory DRLs. My low-beams, high-bemas, and and DRLs have been working intermittingly. I pulled the main swtich out of the dash, and then plugged everything back in, then they started working again. Now I only have high-beams. The DRLs, and low-bemas have stopped working again. Bad relay? Bad switch in dash? Bad switch in turnsignal stalk? Any ideas!!!??? I am very frustrated.