2004 expedition 5.4l 4x4 .. Headlights quit working, the bulbs are good, no blown fuses I've replaced the headlight switch and nothing, on the other hand I've noticed on the multi function switch my washer motor doesn't work, the rear wiper blade doesn't work and the blinkers some times stick could this be the major problem to my head lights? I'm tired of dumping money into it .. Help please!

 

Moved this thread.

 

Honestly man, there is a slim chance anyone here can hunt this down.

You need a mechanic that can take a look at the electrical system.

Someone needs to be able to really look at it and break it down in person.

 

Agree^^

 

You know how to use a test light... If you don't have one.. Get one... Just a cheap test light.. No gizmo's on it... Make sure you are getting voltage to those fuses should get power on both sides of the fuses ... (lights might have to be turned on in some cases) ... If you are not getting power to 1 side... The fuse is bad. If you are not getting power to either fuse.. ITs something before the fueses... Have to checked the relays? pull that head light switch out and check for power there... Be sure your battery cables are clean and all connected.

 

What you'll need to chase this one down is the wiring book. It will contain the test points to locate and probe for voltage until the faulty section is determined. Way too much to explain here without it.

 

Have your battery and alternator tested. Look for a bad ground. If you don't have a test light and a VOM + a repair manual and are not too good with electrical circuits, after a check of your fuses and fuse box of corrossion/the green stuff/water leak into the area, take it to your pro and save from burning things up worse than they are now.