Stop lamps wont work 93 ford explorer

The lower brake lites are wired through the multifunction switch. The high-mount stop lamp is wired differently. Stop and turn at the rear use the same bulb filament, just not at the same time. See the D and E at top, that is voltage for either stop or turn. The black wire from bottom of lamp should be ground.

maybe the one of the contacts on the bulb broke or the brake fuse

Rear Turn Signal, Brake and Parking Lights

1. Remove the tail light assembly screws, then the assembly.
2. Disconnect the twist lock socket from the lens housing. NOTE: To remove the bulb, turn the twist lock socket (at the rear of the housing) counterclockwise 1?4 turn, then remove the socket with the bulb; replace the bulb if defective. Fig. 7: Remove the tail light assembly screws, then the assembly - wagon shown Fig. 8: Twist the socket counterclockwise to remove from the housing Fig. 9: This type of bulb simply can be pulled out of the socket for replacement To install:
   
3. Attach the socket assemblies to the back of the lamp unit.
4. Install the lamp assembly to the vehicle with the mounting screws.

License Plate Light

1. Remove the lens screws.
2. Once the lens is removed you, can access the bulb and replace if needed. To install:
   
3. Install the new bulb, then attach the lens to the body of the vehicle.

Center High Mount Stop Lamp

1. Remove the screws securing the lamp cover.
2. Remove the mounting nuts, then unplug the electrical harness to the lamp assembly.
3. The lamp now should come out. To install:
   
4. Position the lamp assembly to the vehicle, then attach the electrical harness to the lamp.
5. Install the mounting nut, tighten to 62 inch lbs. (7 Nm).
6. Attach the lamp cover. Fig. 10: Exploded view of the center high mount stop lamp assembly - wagon shown
   Fig. 11: Light bulb application chart for all models with non-European headlamps
   Fig. 12: Light bulb application chart for Buicks with European headlamps
   Fig. 13: Light bulb application chart for Oldsmobiles with European headlamps
   

No there not connected, replace the brake light
1999 Chevrolet Blazer Auto Light Bulb Size Guide
Low Beam Headlight Bulb Size: 9006
High Beam Headlamp Light Bulb Size: 9005
Parking Light Bulb Size: 3157
Front Turn Signal Light Bulb Size: 3157
Rear Turn Signal Light Bulb Size: 3057
Tail Light Bulb Size: 3057
Stop Light Bulb Size: 3057
High Mount Stop Light Bulb Size: Assembly
Fog/Driving Light Bulb Size: 880 or 881
License Plate Light Bulb Size: 194
Back Up Light Bulb Size: 3156
Front Sidemarker Light Bulb Size: 194
Ash Tray Light Bulb Size: 161
Glove Box Light Bulb Size: 194
Map Light Bulb Size: 168 or 211-2
Step/Courtesy Light Bulb Size: 168 or 211-2
Trunk/Cargo Area Light Bulb Size: 211-2
Under Hood Light Bulb Size: 93
Instrument-General Light Bulb Size: 161 or 37 or PC194 or PC74
Check Engine Indicator Light Bulb Size: PC74
Hi-Beam Indicator Light Bulb Size: PC74
Seat Belt Indicator Light Bulb Size: PC194
Brake Warning Light Bulb Size: PC74
Automatic Transmission Indicator Light Bulb Size: 194
Directional Signal Indicator Light Bulb Size: PC74
As for the horn, inspect the fuse and relay and most common it would be a bad ground wire or worst a bad horn due to corrosion. Horn will be located in the drivers side fender.
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This may help
Low Beam Headlight Bulb Size: 9003/HB2
High Beam Headlamp Light Bulb Size: 9003/HB2
Parking Light Bulb Size: 3157LL
Front Turn Signal Light Bulb Size: 3157LL
Rear Turn Signal Light Bulb Size: 3157LL
Tail Light Bulb Size: 3157LL
Stop Light Bulb Size: 3157LL
High Mount Stop Light Bulb Size: 2825
Fog/Driving Light Bulb Size: 899
License Plate Light Bulb Size: 6418
Back Up Light Bulb Size: 3156LL
Front Sidemarker Light Bulb Size: 194
Map Light Bulb Size: 3886X
Dome Light Bulb Size: 6411
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Check this reference guide...

2002 Hyundai Accent Car Lightbulb Size Guide
Low Beam Headlight Bulb Size: 9003/HB2
High Beam Headlamp Light Bulb Size: 9003/HB2
Parking Light Bulb Size: 2357A
Front Turn Signal Light Bulb Size: 2357A
Rear Turn Signal Light Bulb Size: 1156
Tail Light Bulb Size: 1157
Stop Light Bulb Size: 1157
High Mount Stop Light Bulb Size: 921
License Plate Light Bulb Size: 168
Back Up Light Bulb Size: 1156
Front Side Marker Light Bulb Size: 2357A
Rear Sidemarker Light Bulb Size: 168
Map Light Bulb Size: DE3175
Dome Light Bulb Size: DE3175
Step/Courtesy Light Bulb Size: DE3022
Trunk/Cargo Area Light Bulb Size: DE3022

From Sylvania Lamp Replacement Guide
License plate
168
168LL Long Life Upgrade: Up to twice the life of the standard lamp.


I hope help you with this. Good luck (remember rated this help).

All the exterior lights run threw the turn signal switch. Except the high mount brake light. If you are talking about brake lights replace the TS switch. Parking lights are a little different. If you have no parking lights front and back, TS switch. If you have front and no back, ground problem. Grounds for the back are usually on the drivers side mounted to the frame.

does the high mount stop lamp work? Try turning the emergency flashers on and off a couple times

the multifunction switch (turn signal switch) is a major cuase of this. your high mount stop lamp wire is run through the switch.

While not likely, it is possible that the light bulbs in both sides are have bad filaments. Turn on ignition key (but don't start engine). Then turn on parking lamps (first detent or "click" on headlamp switch). Walk around car and look for illumination on front parking lamps and rear tail lights. Turn on the right turn signal. Are those (right hand) lamps now changing brilliance? Try the left turn signal in the same manner. Are those (left hand) front and rear lights changing briiliance? Take note of any positions that did NOT change briliance when the turn signals were activated. If NONE changed briliance, you either have a bunch of bad bulbs (unlikely) or a bad flasher (more likely) or a bad turn signal switch (most likely) or perhaps wiring problems (possible if the car has been in a collision or has been "worked on" by some "non-expert" mechanic). Check the action of the emergency flasher control switch located on the steering column (facing up). Pushing it in (down) should result in the button going to two different heights alternately (low, high, low, high). You could just have bad flashers or corroded flasher contacts! Good luck!