99 Super Duty no daytime running lights and no low beams
 

I have high beams. (tells me my light switch is good) flash to pass and park lights. The daytime running lights and low beams went out at the same time. I checked the bulbs and connections at the lights, all good. There is no power to low beams. All fuses are good. At this point, I am thinking it's either the multi function switch or a relay that is common to both. Does anyone know where that relay(s) are located? Any other ideas? tnx

Hi Wayne,
If you have your owners manual check pages 150 & 151.
They should show you the 2 fuses for low beams and where they are located .
If not , get back to us , thanks
You could be correct suspecting the multi function switch, but all the info you need to check should be able to be found .
If by any chance, was the windshield ever replaced in your vehicle?
The reason I ask is they did have some water intrusion problems where moisture got into the fuse panel and corrosion became a serious problem.

Hi, I checked all the fuses including the one for the drl resistor and all are good. I have no manual, but found the diagram online. The windshield was never replaced. Is there a relay? I can't seem to find good info on that. It has to be something common to both low beams and daytime running lights.

Low beams power distribution as well as DRL function come through multiple fuses (checked good with meter or light?) in the Power Distribution Box and through the DRL relays in the DRL Relay Block on the the right/pass side of Instrument Panel..