I have a 96 F250 and my headlights have decided they want to go out. They were fine just the other day but now they wont turn on. I have an HID kit so I thought the HID's were the problem but then I put my my old headlights back in and I only got high beams so now I know that it's something with the truck itself. I did some looking and people with similar problems were saying that its the dimmer. And I also checked to see if i was getting power to the lights and only the high beam was getting power so i thought it had to be the dimmer. Well i just so happened to have an extra laying around so i hooked it up but got nothing, it made no difference. So now i'm sorta lost. My HID's dont work at all and my halogens only work on high beam. Any help is appreciated!

 

So you had an extra multifunction switch just laying around and that didn't fix it? Did you check for power into the multifunction switch? How about the headlight switch- is there power into and out of it?

 

I believe so being that everything else works. parking lights, blinkers, wipers. hi beam shows up on the dash but headlights just dont work

 

You have power to the light on high beam and it still does work? Sounds like a bad ground
could be part of your problem depending on how you are testing for power.

 

I am using a test light. And yes I got power to the high beam but not low, that's why i thought it was the dimmer but it's not

 

Put your test light on batttery + and probe the ground terminal at the headlight plug.

 

Are you talking about inside the plug? And this whole time I've had the dimmer and MFS mixed up. I apologize but I have been referring to MFS the whole time

 

Well I checked inside the plug and with the test light it shows that the ground is good and out of the three plugs only two lit up and I'm guessing that thw one that didn't light up is the low beam being that the highbeam still works with my halogens

 

You got high beam but no low beam (both high and low beam use same power circuit and ground)

Strongly suggests your beam select switch as the problem, part of the multifunction switch (you know as in the turn signal lever sticks out of it).

Got power to the beam switch at the red-yel wire? (you must have or no high beam), coming out of the beam switch power to low beam via red-black wire. Power to high beam via lt grn-blk wire.

If no power at the red-blk wire when you cycle beam switch the lever to low beam position? the switch itself is toast.

 

I'm a little confused on what you have checked and what is actually working. In post #1 you said the halogen lights work on high beam but then in post # 3 you said that you get the high beam indicator in the dash but the headlights don't work. If you already replaced the multifunction (post #1) with a good part I'd think you have a bad headlight switch.
Power comes from the headlight switch over to the multifunction (turn signal/dimmer) switch. Do you have power from the headlight switch into the multifunction switch? Without taking my '94 apart to see what color my wire is, my Haynes manual shows it as a red/yellow wire providing power to the dimmer.

Pretty much what Danr1 said and what I mentioned a long time ago.

 

OK I get highbeam but no low beam with my halogen bulbs, I don't get anything at all with my HID kit. I checked my light switch a few minutes ago and it is good. So my headlight switch, multifunction switch and fuse are good.

 

according to my schematic the wires come out of the multifunction switch and go straight to the headlight bulb(s). Time to start chasing the wire harness looking for broken wires...

EDIT: where does the HID kit splice into the harness? Is there power from both low and high beam going into it?

 

There is no splicing. The hid kit plugs into one factory bulb harness. And then into ballasts then bulbs