Hot.
earth leak or fuse if you are certain the sender switch at top of brake pedal is ok.Put tester on circuit to establish feed or no feed
Yes, but it depends on what your problem is. The switch normally has different circuits for the lights, the cruise control, and a computer feed.
1.0 There is a bundle of wires that feed the lights and turn signal in the back. Right where the different wires separate from the bundle check to see if there is a wire that goes to ground. Make sure it is grounded. or 2.) check to see if one of the filaments in the bulb is burned out. it is a dual filament bulb. yes you have to take off the plastic lens, probably using a star driver.
the tn/rd wire is a power feed the dg wire feeds the trailer brakes. the wt/tn wire is the brake switch input. the bk wire is ground
there are several conections on b/switch if your looking at the right ones one should be batt feed pos outher should go to steering column conector toindicator stalk
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!
Check your tail lights. If they are stuck on the switch might be bad. The brake switch will cancel the cruise. If a light has a ground fault the voltage will feed back and cancel the cruise. Those are a couple places to start looking. If that's not it, it's probably a little more severe.
Make sure battery is fully charged Seized engine? Loose or corroded battery cables? Bad ground cable? Bad starter? Bad starter solenoid? Carefully jump across small trigger wire and starter feed Bad neutral safety switch? Bad ignition switch?
First, check your fuses. Then - The circuit is very simple and you should start at the brake light switch. This is mounted above the brake pedal and lights the brakes when the pedal is pushed. Disconnect the switch and check the voltage at the contacts. Ground one end of your meter leads and set the scale to 20 volts (or so) One leg should show battery voltage and one should show no voltage. If there is no voltage, the problem is on the power feed side of the switch and you should investigate the wiring between the connection and the fuse block. If there is voltage, change your meter to resistance and check resistance between ground and the non-power side. Infinite resistance means that the wiring is bad or all the lamps are burned out. Very low resistence (near zero) probably indicates a short in the brake wiring. Leaving the meter on resistence, check the contacts on the brake switch. With no pressure on the pedal, your meter should show open or infinite. When you press on the pedal the resistence should drop to near zero.
the turn signal switch sends current to the turn signal flasher. it then goes to the bulb. The turn signal switch will turn on the turn signal and when the brake is applied it cancels out the brake light as it is a duel element bulb. 1 element is for brake and turn and the other is for parking lights. you can not have a blinker and a constant feed to the same element of the bulb at the same time.
remove door panel check to see if you are getting power and ground to motor. If so, bad motor--if no power to motor, check to see if you have power to switch if so ,bad switch--if not bad power feed to switch close but if the switch not on, you never get power to the motor.
what is the engine control switch feed wire on a distributer