Headlight Troubles

[bigsal]

Hello everyone. I have an 07, f-250 with headlight issues. The headlights will not always turn on. At first they would turn on after a few minutes of leaving the switch on, now they don't turn on at all. I have checked fuses and bulbs, all good. All other lights turn on and function properly when headlight switch is turned on. If I switch to high beams, those function properly.

Thank you all for your time and knowledge.

[bigsal]

UPDATE---

I have since replaced the headlight switch and the multifunction switch and the low beams still won't turn on.

Any input would be greatly appreciated.

[RedneckYankee]

It may be a headlight relay. I'd check under hood fuse box and see if there are any relays in there that may have gone bad either the contacts or the coil. I maybe sending you on a wild goose chase but may be worth looking for relays

[bigsal]

Originally Posted by RedneckYankee

It may be a headlight relay. I'd check under hood fuse box and see if there are any relays in there that may have gone bad either the contacts or the coil. I maybe sending you on a wild goose chase but may be worth looking for relays

Is there a way to test the relay?

[RedneckYankee]

If you can determine what two terminals are the coil and what two are the normally open contacts. Apply 12VDC to the coil terminals and check for continuity with a ohm meter. Not for sure if there would be a diagram on the relay or not. If not you should have a resistance reading across two terminals and the other two would be open. Like I said not really even sure that there is a headlight relay but I'm thinking there should be especially with auto on lights.