Just as the title states. No low beam headlights. What would be the most likely causes for both low beam headlights to quit working at the same exact time?

I borrowed my son's 2008 350 a few days ago while my 250 was at a shop getting new tires installed. I noticed his low beam headlights weren't working.

​​​​​​I've checked fuses. They're all good.
I've checked the relay. It's good.

I installed the lights from my son's 350 onto my 250 and both lights worked properly.....this rules out bad headlight modules.

The DRL's work.

The turn signals flash when remotely locking/unlocking the vehicle.

All other exterior lights work.

What's next.

Any suggestions would be greatly appreciated.

 

If both stop working, check the main fusible link, 30A MAIN. Can you confirm with a multi meter that the HEAD LP relay actually receive +12V?

Passenger Side fuse box

 

Thanks for the reply. I checked everything out. Finally discovered the problem to be the headlight/turn signal stalk.......a piece the dealership calls "multi function" switch.

Ordered a new one.....also ordered the windshield wiper switch because the intermittent setting is non functional.

Installation requires removing the steering wheel......not looking forward to the process.