Question about 1987 Ford F 350

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Brake lights won't work on F 350 I have checked: bulbs, ground at lights,plug at rear of truck, fuse, and replaced switch. 4 ways don't work either.

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There is a switch on the brake pedal check that

Posted on Jul 15, 2009

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No power to left rear turn/ brake light


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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Oct 13, 2014 | 2000 Ford Expedition

3 Answers

1994 Chevy C1500 truck. No rear brake lights


Most likely this is a brake light switch issue. Replace switch.

If your emergency flashers don't work, all flasher bulbs are fine, but flashing too fast, then check and replace Hazard light switch.

Oct 29, 2012 | 1994 Chevrolet C1500

1 Answer

I have no brake lights in my '97 dodge caravan le but i have taillights


Have yoiu changed/checled the lightbulbs? (In other words,do your turn signal lights work? If the front turn signal lights work, but the rear don't, then turn on your four (4) way flashers. If the rear lights still don't work, then all the bulbs are bad. It is rare for all the bulbs to be burnt out at the same time, but it does happen.

If the turn signal/four way flasher lights work, then you probably have a bad brake light switch. However, first check your owner's manual to make certain there is not a separate fuse for these lights. If there is, then swap the fuse for the brake lights for another fuse (or relay) of the same size/amperage. (Facing the hood, the power relay box is located on the right side (usually) under the hood.)

The fuse box is located under the dash, on the driver's side of the car. Usually there is a plastic cover that has to be removed to access the underside of the dash, and then there is a plastic cover that has to be removed to access the fuse box. If you don't have an owner's manual, nprmally the fuses and power relays are normally marked on the plastic covers your remove ot access the fuses and power relays.

If the fuses/relays are good, then you have a bad brake light switch. This is located on a bracket just above the brake pedal. When you push the pedal down, the switch makes contact. Disconnect the plug to the switch, and jump across the plug contacts (not the switch) with a small piece of wire, or if a piece of insulated wire is unavailable, you can use a paperclip, you won't get schocked, just make certain that the paperclip does not come in contact with a ground while you have it plugged in to the plug for the brake light switch.

If the lights stil dont work, check for power to the plug for the brake light switch. If you have power to the plug, the turn signals and four-way flashers work, then my guess would be that you have a broken power wire (probably iside the steering column, or a bad turn signal switch. If the brake lights work whe nyou jump out the brake light switch, then the brake light switch is defective.

Oct 16, 2011 | 1997 Dodge Caravan

1 Answer

Both rear turn signals have stopped working, front are fine? Is it the switch?


the switch controls both front and rear signal lights.the wires just T off in the harness to go both ways.you don`t say but are the rear bulbs ok.there is 2 filaments in the bulbs one for tail lights and one for signals/brake lights.so the brake lights work if so then the bulbs are good.if not then the bulbs may be the problem.it could also be a wire feed/ground problem that you will have to trace from the sockets back through the system with a test light checking for power and ground.

Jun 14, 2011 | 2006 Dodge Ram 2500

2 Answers

Brake lights not working on 2003 E 350


Have you checked the fuse for the brake lights and have you checked the brake light switch.
The brake light switch is directly above your foot when it is placed on the brake pedal.

Sep 07, 2009 | 2002 Ford E350

1 Answer

Brake lights in rear will not work


Do you have a trailer plug? Look for corrosion around taillight plug under truck in the back, PULL IT APART to see if there is any corrosion. If you find none, than take the taillight housing out and run a external wire from a clean spot on frame to the ground on housing, it could be a ground issue. Did you test light the break light switch power in power out?

Apr 10, 2009 | 1991 Chevrolet C1500

3 Answers

The brake lights are not working


could be the wiring connection. i'm sure the three lights came from the same line from the brake switch. so if the third light is coming on, then the connection where they separated should be tyraced. or the ground of the side lights could be missing,. check the ground wire of the side lights for proper grounding.

tnx 4 using fixya,

drcool

Nov 04, 2008 | 1999 Dodge Caravan

2 Answers

Rear brake lights are not working


Hi,

There are a couple of probable reasons why the brake light are not working, they are:
  • brake switch - underneath the dash. It is activated when the brake pedal is pushed. It is a spring loaded switch and is normally off. If the sprin is defective/missing then the switch will not activate;
  • brake light fuse;
  • bulbs;
  • corroded bulb socket - most brake lights are integrated with the rear park lights. The bulb socket would have 2 contacts, try checking if they are clean and reaches the mate in the end of the bulb;
  • wrong installation - the bayonet socket of most park/brake lights combo are offset, there is a right and wrong way if installing it into the bulb socket;
  • loose wire - it would be required to trace the brake wire to where it joins the rear harness;
  • loose ground - same as above or a workaround is to wire an additional ground wire from the housing of the bulb socket to any screw that is connected to the body ground.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Jul 29, 2008 | Mercedes-Benz CLK Cars & Trucks

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