Brake lights on '99 Expedition sporadically light up. It seems that the cable that goes into the switch assembly for the brake light is a little too kinked so if I attempt to move the cable over and take some of the kink out of the cable the brake lights work for awhile, until the cable goes back to the old position. Also, are those assemblies easy to replace. It seems you need a childs fingers to replace it.

make sure check brake light fuse first if brake light fuse okay.you replace brake light switch by removing trim panel below steering column.look under brake pedal area unplug electrical connector .remove the cotter pin and pull switch and power brake booster pushrod off the pin.then slide switch off power brake booster pushrod dont lose small nylon washer when installing new brake light switch.

I had a similar problem when I owned a 1997 Expedition. In my case, the brake light switch, mounted to the brake pedal arm, was faulty. My guess is that you have a similar problem. Pretty easy to replace... couple of wires and a clip as I recall.

Good luck.

Its actually EPC light. This light indicates to check the brake system.Its indicating towards brake assembly parts.The brake light,brake fluid,brake wirings,brake caliper,brake pads,the brake switch. On most of the cases its brake light switch problem causing the EPC light to come ON.there is also recall for this problem.Confirm this with your VW dealer.If its under recall,they will replace the switch for free.The brake lamp switch recall includes 99-07 beetles and jetta also.------------------- This should help.Thanks.Helpmech.

from autozone.com
Fig. 2 Brake pedal position switch removal- F-150, F-250, Expedition and Navigator; 1999-00 F-250SD, F-350, and F-Super Duty Models

1. Disconnect the negative battery cable.
2. Disconnect the brake pedal position switch.
3. Remove the self-locking pin.
4. Remove the brake pedal position switch from the brake master cylinder push rod.
5. Remove the brake master cylinder push rod spacer.
6. Remove the brake master cylinder push rod bushing.
7. The installation is the reverse of the removal.

possible cable out of adjustment to loose.try forcing brake aplicator towards full off and see if it goes off. if so adjust switch or cable

step on brake padel then shift

It could be a number of things, the good news is that none of them are serious or expensive to fix.

The normal components that make up your brake circut are:

1. The brake light fuse (In the fuse box and labeled as such)
2. The brake light switch/relay - also called a stop light switch. It's under the dash, right behind the brake pedal arm. When you push the brake, it sends a signal to the lights which turns them on. Think of the dome light switch in the door jam of your truck. When you open the door, it releases the switch and your dome light pops on. Same thing with the brake light switch.
3. The bulbs in the tail lights and the 3rd brake light.
If none of them are working, it's most likely a fuse or the switch/relay under the dash. If it's the switch, it's a $12 part. Obviously fuses are only a couple bucks.

check the brake light switch at the top of the brake pedal and also the fuse link on the battery on the passenager side up near the firewall make sure all of them are clean.

check the connector at the brake switch located on the brake pedal lever arm if it is ok it is most likely a faulty switch

check your brake light switch,its located under the dash on the pbrake pedal assembly.