towing lights

I have an 2008 Explorer EB V8.

has factory tow package
all of a sudden the pass side break/blink light (green wire) does not work for the trailer.
it is on the vehicle side. all other trailer lights work.

i also have the dome light that comes on. i heard it was the ignition switch. not sure if related.

suggestions were to start?

anyone have a 08 explorer wiring diagram?

 

[thebrakeman]

I'd start with the light bulb.
If that's OK, I'd try powering the trailer wiring by other means, to be sure it's possible to get power to that light.
Just keep narrowing things down to isolate.