Power is being interrupted; the turn signal switch is a power juction see if the power is flowing thru it.
A brake light switch is a mechanical electric switch that is set in the off position (open circute) and located in front of the brake pedal. When you step on the pedal and its position changes the switch complete's its circute sending power to the brake light. The brake light switch is protected by a fuse or circute breaker and has no other connection with the operation of the brakes.
Check to make sure you have power at the brake light switch, if you have power at the switch, depress the brake pedal, and check for power out of the switch, if no power out with the brake pedal depressed, you need a new brake pedal switch.
The 1996 GMC Yukon brake lights work by receiving power from the brake light relay switch. The brake light relay switch is connected to the brake pedal.
Check for power at brake light switch Check for power and ground at the brake light sockets open wire?
Check your fuses first. If those check out, pull out the tail light assemblies. Check the bulbs. If those check out, test for power at the connectors to the tail light assemblies with a test light. If you have power to the brake light circuit (with the brake applied), then the issue is in the tail light assembly. If not, go to the brake light switch located at the top of the brake pedal. Test for power at the input... there should be constant power to it. If not, there's an issue with the power supply, and you'll have to trace it to the fault. If so, test for power at the switch output with the brake pedal depressed.. if there's no power there, the switch is faulty. If there is power there, then you'll have to trace the wiring towards the tail lights to find the fault.
If you have the same bulb for brake and signal, brake light power needs to be interrupted by the signal lights, The brake circuit has to go through the signal light switch so the problem could be there.
the brake light wiring often runs through the turn signal switch i would test power going in to the brake light switch on the pedal and power coming out when pedal is depressed if power is ok suspect turn signal or hazard switch
There's continuous power supplied to the circuit. When the switch contacts, it closes the circuit and allows the power to go to the brake lights.
Stuck brake light switch, or a short to power somewhere in the brake light circuit.
Check the brake light switch located on the brake pedal lever. If there is power to the switch but nothing coming out replace it. Did you check the bulbs? Is there power to the rear sockets?
You may have a bad brake light switch that is located behind the brake pedal. It is also possible that a wire is off on the switch. Check for power on the positive side of the switch and see if you have power to the other side of the switch when you touch the button. If you do, then you have a broken power lead to the brake lights or a broken ground in the trunk
You won't hear a clicking noise from my brake light switch it doesn't make that noise.
you have to pull the feed wire off the brake switch to supply power to the new third brake light. get a test light and test the wires on the brake switch....one is hot all the time the other one gets hot when you depress the pedal....that is the one you need. do not take it pull your power from the rear light it might have an intergrated turn signal wire. which would make your 3rd brake light blink.. ok.have fun! you have to pull the feed wire off the brake switch to supply power to the new third brake light. get a test light and test the wires on the brake switch....one is hot all the time the other one gets hot when you depress the pedal....that is the one you need. do not take it pull your power from the rear light it might have an intergrated turn signal wire. which would make your 3rd brake light blink.. ok.have fun!
The switch is attached to the brake pedal itself. An energized pole goes into the switch, and, when it makes contact, the circuit is closed, allowing power to be transmitted to the brake lights.
start by checking fuses,then at brakelight switch check for power on one wire,should have power.next check power on the other wire with brake pedal pushed down.if you have power check wires from switch to lights if third brake light works fuse and switch ok.
You need to check the wiring for power to the bulbs.
I would check the brake light switch first. It's a common problem. The switch is located down on the brake pedal and is easy to change. Use a 12 volt test light to check for power at the switch. You've changed the bulbs or checked for voltage at the brake light sockets first?
How the brake lights work on a 66 Mustang is very simple. Power goes from the headlight switch to the brake light switch, then through the turn signal switch and back to the brake lights. There is no fuse in that system. There is a self resetting circuit breaker in the headlight switch, but, if that was tripped, none of the lights on the car would work. The first thing to check is the brake light switch itself by bypassing it. Unplug the connector from the switch and run a jumper from from one slot in the connector to the other. If the brake lights come on, replace the brake light switch. If they don't, the problem is either a wire has lost continuity or there is a problem in the turn signal switch.
Check all the fuses and replace any that are blown. Check the bulbs for blown elements. Using a test light, check for power going into the brake light switch under the dash attached to the brake pedal. If you have that, check for power going through the switch with the pedal depressed. If there is power, you have a broken wire between the switch and the rear lights.
It' likely, if bulbs are OK that the turn signal switch is burned out. If the switch fails, it won't allow the brake light signal through to the brake light wiring. Go to:http://www.2carpros.com/first_things/no_brake_lights.htm for the 4 page analysis. See: "(American Car) Both Lower Brake Lights Not Working" To determine if the switch is bad test the incoming and outgoing current. If brake light switch power is present at the turn signal switch but not at any outgoing brake light wires, the turn signal switch has probably failed. This is a Buick design issue because keeping your foot on the brake or if the brake switch sticks keeping the brake lights on, the circuit will fail due to amperage overload.
In that case, start tracking back. The turn signal switch pulls the brake light out of circuit when the signal is operating. If the switch fails, the one or both stoplights can stop working.
have power to fuse box but not brake lgt switch new bulbs all wiring ckd brklgt switch replaced. this should be up with my question new here oops
A bad brake light switch or a bad headlight switch, or the power source of the fuse has a problem or break in the wire (circuit).
The cause of the tail light burning dim when the light switch is on could be a short in the wire or an exposed portion of wire. This can sometimes cause the bulb to lack power because the power is drawn to another area.