I have a 1999 ford expedition the license plate lamps do not work, I need to know where the fuse is located and the number pf the fuse

I don't think there is a fuse for them. Have any other features stopped working? Some vehicle features share a fuse so those features would also stop working if the fuse has blown. Check the bulbs are OK as in some setups one bad bulb can turn both bulbs off.

are the bulbs good ? Do the tail light's , park light's work ? These light's all come on when you turn the headlamp switch on to park lamps or headlamps .

Turn ON the park lamps.
Observe the license lamps.
Do the license lamps operate properly? Yes - No
No ? Go to Step 3
Do the park lamps operate properly? Yes - No
Yes - Go to Step 4

Remove the inoperative license lamp bulb.
Connect a test lamp between the instrument panel lamp fuse supply voltage 1 circuit of the inoperative license lamp bulb and the ground circuit of the inoperative license lamp bulb.
Turn ON the ignition, with the engine OFF.
Turn ON the park lamps.
Did the test lamp illuminate?

DIMMING FUSE 10 amp - located in the under hood fuse box .

Easiest thing is to pull each fuse one at a time to see if one is blown, or if you have a test lamp or volt meter, you can check for voltage on both side of each fuse while everything is turned on.

normally the number plate light is on the same fuse as the park lights . I would be looking for a fault in the number plate area ( broken wire or blown bulb or bad/ no earth)

I'll tell you where the fuse is but I want to mention that if it is just the license plate lamps that are out you may have other problems. The fuse you are looking for also controls the power to the left & right back up lamps, the right park & stop lamps and I think the left turn signal but don't quote me on that. So as you can see this fuse covers more then just the lamps for the license plate. Anyhow the fuse you are looking for is in the fuse box located to the left of the steering wheel by the brake pedel. It is in the number 7 position (see picture below) and is a 15 amp blue fuse. I hope this helped and good luck.

Hi
There are a couple of wiring diagram and manual available on the net. The relay you are talking about is the park lamp relay which supplies power to the tail lamps, license plate lights and both front and rear park lamps. If the park and plate lights are working the light switch, relay and supply power are good. You need to verify for a broken brown wire to the tail lamps (assuming the sockets, lamps and grounds on both tail lights are good) .If none of the lamps are working then the 15A fuse number 3, the light switch or the park lamp relay could be bad (note different contact in the main light switch work the other lights)

You can find a wiring diagram and component location at
www.autozone.com and http://www.pdfgeni.com/book/1998-ford-ranger-wiring-diagram-pdf.html

Let us know if you want something more else accept the solution.
Thanks for contacting fixya.com

There should be 2 screws holding the lenses on for the hatch light, remove those and cover comes off. The plate lights, access them under the rear bumper, they twist and pull out, then just pull the bulb out the connector. The running board light, under board, which will take the light assembly out, or a small flat head screwdriver, pop the lens off the top of board.

Hi,

Fuse # 4 (5A) in the fuse panel powers the Park Lamp circuit.

If the fuse is ok, then you'll need to inspect the relay, or check for a short in the circuit.

look in you owners manual or on the cover of the fuse box. but if it's the only thing not working then it may be the bulbs or a bad conection for the hot or the ground.

I'm not to sure what one you did want license plate light or the tag light up high above your back door. I know I am reading license plate so I will say the fuse needs to be replaced. plate lamps need 2 light bulbs and the fuse box is under the steering wheel or under the hood there are 2.
in my book it said that it is a (194 trade number), I woulds change out bulbs and then fuse.