On each corner of the underside of the running board there is a rubber/plastic flap that covers the bulb socket. One end of the flap is held with a Phillips head screw. Remove the screw, swing-down the flap, and turn the bulb-socket counter-clock-wise 90 degrees. Pull out the socket to remove the old bulb and replace it with a new $1.50 bulb from a Ford dealer's service department.
If you go to the parts store they will tell you, and since your there you can also buy them.
They probably aren't grounded.
the fuse that controls the interior lights, running board,an rear wiper is blown. it is a 15amp fuse in the panel. Also,try the cluster dimmer position since it controls the running board lights and exterior mirror lights as well.This dimmer is located next to the headlight switch.Good luck!
I'm not a mechanic / technician but i was looking at the 2001 Ford Expedition Owner Guide and it shows : In the Power Distribution Box ( which is " live " ) located in the engine compartment on the drivers side of the engine compartment ( fuse # 15 is a red color 10 amp mini fuse for the running board lamps )
You get under the running boards right under the lights. there is a little plastic housing. pull this housing down and change light bulb is that easy.
you can't replace just the bulb itself. you have to replace the whole bulb and lens assembly and you have to get them from the dealership. they are somewhat expensive but there is no other solution that i know of.
On my 1997 Expedition I found a rubber boot directly underneath the forward light in the running board. There is one Phillips head screw at the front of the boot. Just remove the screw and pull the boot down far enough to expose the plastic socket that holds the light bulb. Turn 1/4 turn counter clockwise to remove the socket and bulb. The bulb is a small wedge base bulb that pulls straight out (it's a smaller bulb but identical to the 7 watt wedge base bulbs for your exterior walkway lamps). Just pop in the replacement bulb and push the socket back into it's hole, turn clockwise 1/4 turn to lock it in and replace the screw to hold the boot in place. I used a Sylvania 194 (4.6 watt) replacement bulb--not sure if that's exactly right but it works!
Bulging of exterior walls often results in sagging of the ridge board.
I had the same problem with my expedition and they said it was the vent door on the blower which is located in back of the glover compartment. In order for them to replace that part they have to take the dash board apart.
Under the Running Board was created in 2008.
I hope your referring to the light bulbs. If so, I think they are the #194 mini bulbs. Your Local Parts Store will be able to verify this info.
replace on board computer