Question about 2001 Lincoln LS

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Driver side brake light does not work. Although all four way flashers, turn signals and backup lights work. What can I do to fix this problem?

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Stoplamps Brake lighting is controlled by the REM, (Rear Electronic Module). The brake pedal position (BPP) switch is hardwired to the REM. When the brake pedal is depressed, the BPP switch will input information to the REM. Then, the REM will process the information and output to the left, right, and high mounted stoplamps. Only the left and right stoplamps will provide lamp outage indication.
The vehicle's electronic functions are divided into zones. The FEM controls the front portion of the vehicle and the REM controls the rear portion of the vehicle. These systems rely heavily on the SCP communication network in order to transmit and receive signals. As a technician it is very important to understand:

  • where the input (command) originates from.
  • all information (messages) necessary in order for a feature to operate.
  • which module(s) receive(s) the input or command message.
  • does the module which received the input (message), control the output of the feature, or does it output a message over the SCP communication network to another module.
---------------------------------------
    1. If the concern remains after the inspection, connect the diagnostic tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
    2. check that the program card is correctly installed.
    • check the connections to the vehicle.
    • check the ignition switch position.
    • which module controls the output of the feature.
    ------------------------------------------------------------
    • One or more stoplamps are inoperative — LR stoplamp
    • Bulb.
    • Circuitry.
    • REM.


    Measure the voltage between LR stop lamp C414 pin 1, circuit 29S-LF23 (OG), harness side and ground.

    • Is the voltage greater than 10 volts?
    Driver side brake light does not work. Although - s1x~us~en~file=arrow.gif~gen~ref.gifYes
    GO to R4 .
    s1x~us~en~file=arrow.gif~gen~ref.gifNo
    REPAIR the circuit. TEST the system for normal operation. ------------------ Measure the voltage between LR combination lamp C414 pin 3, circuit 31S-LG14 (BK/OG), harness side and ground.
    • Is any voltage indicated? No GO to R6 . -----

    Posted on Apr 29, 2009

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    Brake light trouble right side brake light will not come on but both flashers work also turn signals work older ford truck what could the problem


    I have to think the problem is inside the turn signal switch, a poor internal connection. You know the brake signal first goes through the turn switch before it goes to the bulbs. That is why the brake lights and rear turn signal lights share the same filament in the bulb, and the same wire going to those lights. The only difference is the turning side light is affected by the turn signal flasher, causing blinking, while the other side- the non turning side-does not go through the flasher relay, but straight to the bulb from the turn signal switch. Change your turn signal switch and I believe you will solve the problem. Let me know, okay?

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    The tail light is usually a bulb with lower wattage, so it won't glow as brightly as the brake and turn lights.. There should be one or two other bulbs in either of the two tail assy's. The turn signal can use the same bulb as the brake light. If so, it's up to the flasher assy to direct the lights to both come on, and/or for one to flash if the brake and turn signal is on, e.g.. There could also be a backup light.

    So if the brake and turn lights don't operate, look to the fuses, and flasher assy. for possible replacement.

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    Why are al my lights coming on when I mash the brake peddle or use left turn signal


    Spray electrical cleaner in where the emergency flasher switch is. Turn it on/off rapidly several times. Spray into the directional switch, too. Dirty contacts there are a common source of trouble. Might need a new multi-function switch if cleaning does not fix it.

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    Turn signal and brake lights not working properly how do i fix this


    turn on your hazard flashers then off again some times dirt gets arround this switch and causes funny things like that to happen. good luck

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    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.

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    Hello heinz2127: My name is Roger and i will help you. The rear brake wires are green and yellow. They also are the turn signal wires. The brake lights work through the turn signal switch.The turn signal switch has logistics for determining which side is blinking so as to make the opposite side to show park brake light.Check the fuse box for a blown fuse. Look at the fuse box under the hood. Also try this. Turn on the four way flashers. Step on the brake pedal . The lights should stop flashing If not I would replace the turn signal switch.

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    Will your Center High-Mount Stop Light (CHMSL) illuminate when you depress the brake pedal, but the lower/outer lights will not?
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