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In a lighting circuit an open circuit will turn off the light.
Often this type of behavior is caused by a bad ground for the lighting circuit. Check the ground circuit for the brake lights.
a closed circuit is a complete circuit with no breaks at all, one example:- a closed circuit occurs when you turn the light switch on an open circuit has a physical break in the circuit, which stops the flow of electrons. one example is when the lights are turned off, the switch creates a physical break in the circuit
A mis-wiring or short circuit somewhere between the controls, fusebox and lights.
When you turn on a light switch you do not have an open circuit.
if you have a tow package, check the wiring connector for shorts, some times they corrodes and causes a short circuit
If you remove one light from a chain of lights, and the other lights turn off, then it is a 'series' circuit.
An open ground or a short to ground when the signal is on. Usually a bad bulb.
There could be many causes for the flickering instrument panel lights, but the most probable cause is a loose connection in the circuit providing the power to the lights, or a loose or poor ground connection.
Brake lights and turn signals are on a separate circuit from the tail lights. Tail lights are on the same circuit with the dashboard lights. If the dashboard lights aren't working either, check the fuse. If they ARE working, check the headlight switch.
No Lights, BUT the Fuse is OKThe most common causes of the issue you describe include:A connector in that circuit which has become disconnected.A buildup of road film or corrosion inside of one of the connectors in the wiring harnesses for that circuit.A cut or broken wire in the circuit which causes the circuit to be "open."Corrosion in the light switch or a relay [IF there is a relay in the circuit].Corrosion at a ground connection at the light assemblies, BUT that would usually only disable one of the lights, not all.A defective [corroded or worn out] main light switch.There probably may be some more causes that I can't think of now.
Brake Lights Don't WorkThe brake lights and turn signals are on a separate circuit of their of their own and thus independent of the tail lights and side marker lights ["running"] lights.There could be several causes for this problem, and without being able to see and troubleshoot the brake light wiring circuit no one can tell you the specific cause.Some of the possible causes include:Brake light switch is not adjusted properly.The fuse for that circuit is "blown" out.A wiring harness connector anywhere in that circuit has become unplugged, or loose.The ground wire or wires for that circuit have become disconnected, or the connection of the ground wires to the vehicle's grounded body sheet metal has been blocked by corrosion.A wire in the circuit has been cut, broken, or pulled loose.The brake light switch has become defective.There are probably a few other causes I have forgotten about.