the emergency brake pads ARE the REAR brake pads.
Either your emergency brake is engaged or the brake fluid level is low in the brake master cylinder in your engine compartment
The only way you can completely turn off the headlights is to push in the emergency brake slightly, then start the truck and leave the emergency brake on the slightest setting, and the running lights will stay off. Obviously the brakes will be slightly engaged, but you can adjust the emergency brake so the first click doesn't engage the brakes.
Easy answer. Remove the tire, pads, calipers, and rotor. There is a screw to adjust the e-brake or parking brake.
From the Ford Dealer
first check your brake fluid it may be low then check the switch at the emergency brake lever it may be stuck
Bent of misadjusted shift linkage?
Make sure the emergency brake pedal is retracted all the way up. Or check the switch at the E brake pedal. The headlights go off on all 1999 tahoes when the emergency brake is on.
Loose contacts or your sensor may be stuffed - see an auto electrician
There is no such thing as an "Emergency brake" in a vehicle. The PARKING BRAKE is the pedal to the far left against the edge of the driver's footwell. The handle above the pedal is the release.
The power distribution box ( which is " live " ) is located in the engine compartment near the brake fluid reservoir in a 1999 Ford Expedition
check brake fluid in master cyclinder,make sure it is not low.also check emergency brake for being say 1/2 on or the emergency brake switch itself for out of adjustment.