Ford 1989 f 250 auto

Check Fuses and Relays, but this has a GEM (general electronics module). You may need and auto-electrician as nothing covers brake lights, but that may be a fault with the brake light switch.

Fuse Box Diagram Ford Taurus (2000-2007)

https://fuse-box.info > ford > ford-taurus-2000-2007-fu...
Here you will find fuse box diagrams of Ford Taurus 2000, 2001, 2002, 2003, 2004, 2005, 2006 and 2007, get information about the location of the fuse panels ...

2003 Ford Taurus fuse box diagram - StartMyCar

https://www.startmycar.com > Taurus > Fuse box
The 2003 Ford Taurus has 2 different fuse boxes: Passenger compartment fuse panel diagram. Power distribution box diagram. * Ford Taurus fuse box diagrams ...

The fuse box is located down by the emergency brake pedal. The brake light fuse is fuse number 11, a 15 amp fuse.

Check for blown fuse for ECM in panel under steering column. Scan tool will not work if this fuse is blown.

Check the display. Ask a helper to step on the brake pedal while you check the lights from the rear. If no lights appear, check the fuse that connects the brake lights. The owners manual will show the location of the fuse box and which fuse is for the brake lights. Pull out the fuse and look at the wire in the central window. If the wire is broken, replace the fuse. Make sure the new fuse is not blown, and carries the same amperage.
Take note of lights that are out, if any are working. The problem may be cured by replacing the bulb in a brake light that's out. A burned out bulb has a broken filament and a dark brown spot on one side. Check the owners manual for bulb type.
Check the circuit if replacement bulbs and fuses do not restore the lights. Find the wiring diagram in the vehicle assembly manual. The circuit for the brake lights runs from the battery to the fuse, to the pedal switch, to a connection plug, to the lights. The circuit has to be checked with a volt tester at all points.
Check the battery power and the light on your volt tester. Turn the ignition key far enough to activate the electrical systems. Turn on the lights to check for battery power. If the battery has power, ues it to check the volt tester. Put the black lead (the ground) from the volt tester on the negative battery terminal. Briefly touch the red tester light on the positive terminal. The light on the volt tester should flash brightly.
Test the wiring to the fuse. Clip the ground wire to solid metal near the fuse. Touch the light tip to both sides of the fuse. Both should light the tester. If neither side lights, the wire between the battery and fuse is bad. If only one side lights, the fuse is blown.
Test the switch and wiring. Touch the light tip of the tester to both terminals on the brake pedal switch without putting any pressure on the pedal. One should carry power and the other should not. When both show power, the switch is stuck and the brake lights are always on. If neither shows power, the wiring between the fuse and the switch is bad. Now check both switch terminals while the pedal is depressed. Both sides should light the tester. If not, the switch is bad.
Check the connection plug. Unplug the connection and refer to the vehicle manual to identify the brake light wire. Touch the tester light on the brake light wire at the inner socket on the battery side. If the tester lights, the power is flowing to this point. If not, the wire between the plug and the pedal switch is bad.
Check the socket. Plug in the connector plug and remove the bulb. Touch the contact inside the socket. If the tester lights, the socket is good. The socket and wire running to the plug should be replaced if the tester doesn't light.
Check the bulb with the ground wire. The bulb must be in its socket. The ground wire running to the socket should be black or brown. Stab the tester through the insulation. If the tester lights, the bulb is good. Replace the bulb if it doesn't light.
Check the ground wire. Remove some of the insulation around the ground wire. Twist one end of the extra wire around the exposed ground wire. Touch the other end to a solid piece of metal. If the brake light comes on, the ground wire is bad.
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the brake light switch contacts the brake pedal arm under the dash, could be out of adjustment,but before doing that, use a tester to verify voltage to the switch. if you have power put the tester on the other wire and press the brake if it shows that you have power on both sides of the switch then the problem could be in the lights themselves. turn on your emergency flashers or turn signal and check at the back of the truck. if no lights are flashing check the bulbs and verify that the unit has a good ground. check for power at the light unit. if no power track the wires under the truck. you have a broken wire. good luck .

USE A FUSE TESTER, TEST ALL THE FUSES, UNDER THE HOOD & INSIDE THE CAR. THERE ARE TEST POINTS FACING OUT ON THE FUSES. THEY CAN REMAIN IN THE FUSE BOXES. TURN ON IGNITION SWITCH DURING THE TESTING. POWER ON ONE SIDE ONLY, BAD FUSE. POWER ON BOTH SIDES, GOOD FUSE. POWER ON NEITHER SIDE SPARE FUSE.

Check for the busted fuse in the fuse box. This can be done using a multi-tester, Set the tester to 1 x 10 Ohms. Using a multi-tester, put one probe of the tester to one end of the fuse, while the other probe to the other end of the fuse. Good fuse will move the pointer to zero,
while bad ones won't. Check the fuse one by one.

Check the brake light switch. It should be energized when the switch is depressed. (constant power in and power out only when pedal is pressed) Taillights and signals power through the steering column and light switch. BUT first check the fuses. I seem to remember there being a fuse for the truck brake lights and another for the trailer brake lights. Use a tester and check trailer wiring brake lights. If they work, look for the truck brake light fuse.

Probably the battery. Take it off the car and take it to Auto Zone and they will test it for free.

Check the fuses in the fuse box. Use the diagram on the back of the cover. also check to see if there is power to them by using a light bulb tester. That should determine if you have a short or a cut wire somewhere.