could it be a bad auto-headlight module? I also pulled the 3 DRL relays under the hood (one at a time), and this did not seem to fix it.

It also seems the running/marker lights are staying on, even in the daylight. I will double check tomorrow though. The parking brake also seems to not affect the DRL function either.

 

Fixed it! Found a short in the old plow headlight wiring. Wrapped conduit & tape around the wiring. All is good!

 

I have a similar problem except when the high beams are turned on by pushing lever forward, they do now work. Low goes out as does the entire dash. Is this likely to be the pull tie mentioned above trying to disconnect the wireing?

 

4 yer old expedition

 

Checked and replaced all possible fuses, pulled steering column cover off and checked all wires to dimmer switch, everything looked fine. Pulled bulbs out, they look ok, but checked wiring for bulb, and it was ok too. I swapped a bulb with one I knew was good and it works now. Turns out that I blew both high beams simultaneously, what are the odds? I feel like I should go play the lottery now.

But, I hope that doesn't mean there's something else wrong that made them both blow at once...

 

I am having the same problem and that's why I'm on here. I replaced my switch and still having problem. I didn't think to look at everything else. Anyone have ideas?

 

The root cause for my problem was faulty wiring for a snow plow headlights, installed by the previous owner. I removed the old jumper harnesses, and now using the factory wring, at the headlights, with no issues.

 

Thanks! Fuse #35 w/20 amp was the problem on mine, it wasn't bad but I cleaned the contacts on the fuse with sandpaper and stuck it back in there and wala! I have brights I can't believe I tore the steering consle apart and dissected the multifunction blinker switch to figure out lATER it was a dirty fuse....

Thanks Gunner for the great advice this worked like a charm!

 

My van is a 2004 E250 and doing the same thing. My fuse 16 is for the power seats, what was yours labled? I want to see which fuse is labled the same in mine.

 

having issues with my f450 chassis... Both high beams out at same time. fuse 16 looks good, headed out to check fuse 30, and pull bulbs to check for power...

 

#16 on my truck. I tried throwing a fuse in to fix this problem on my truck, but the connector seems to be non-existent.

 

I finally got mine fixed too - I tried this and that fuse and wasn't adding up - Basically just got my meter and did continuity test on all fuses in panel - Bam - Found a 30a that had blown on the right hand side of the panel.

Lights work now - Thanks for the ideas!

Jon

 

I am having the same problem. Low beams work, flash to pass nothing comes on, high beams clicked forward give me nothing, no dash light.
Have no power at fuse 30 when high beams switched 'on', and when I disconnected plug at multifunction switch, 2 terminals were burned out. I rewired them with new terminals but still no luck. Everything else in the multifunction switch works, any idea where this problem could lie?

 

I know this is an older thread but someone added to it no that long ago so maybe I can get some input. 2004 Excursion US truck, no high beams

Low beams work, power to the connector 12v both bulbs. Flash to pass works power to both high and low pins when pulled. All fuses are good checked with meter. When high beam is activated MFS pushed forward power to the fuse but no power to the pin on the light connector when the flash to pass is pulled power to the fuse and power to the pin at the bulb and in both instances the high beam light on the dash comes on.

I assume power flows through the multifunction switch to the fuse then from there out to the light through the main harness. Is my assumption of the power flow correct? If not is it the multifunction switch that is bad or any other ideas?

Anybody have the pin out for the multifunction switch so I can test it before replacing it?