Right: When installing the brake light switch (2) it should be pressed against the pedal support (3), so that the switch pin when the pedal is released (4) also hit the switch. The pin block must be correctly connected for perfect operation (1).
Brake signal monitoring should be carried out as often as possible in the interest of safety.
- The garage wall behind the car should give off a red glow when you press the brake pedal.
- While driving, use the rear view to check whether your brake lights are reflected in the headlight reflectors or on the paintwork of the car behind you.
Stoplight switch
When you press the brake pedal with your foot, the spring in the brake light switch (it is fixed in the holder of the brake pedal suspension) presses on the control pin. At the same time, the contacts in the switch close and the electrical circuit to the brake lights closes. If the brake pedal is released, the pedal neck depresses the control pin to its original position and the brake light goes out.
Checking the brake light switch
If both brake lights do not light, check as follows to see if the brake light switch is the cause.
1. Disconnect wire lugs.
2. Close the ends of the wires with a paper clip or a piece of wire.
3. If at the same time the brake lights are on, then the brake light switch is faulty.
Replacing the brake light switch
1. Disconnect the switch wire lugs.
2. Rotate the switch 90°and remove it from the holder.
3. When installing, insert the switch into the holder and make sure that the neck of the switch fits snugly against the brake pedal.
4. Turn the switch 90°counterclockwise.
5. After installing the new switch, connect the wires and check its operation.
6. When you press the brake pedal with your foot, the switch adjusts automatically.
7. To check: the brake light switch must be installed in such a way that when you press the brake pedal with your foot, the brake light lights up no earlier than after 5 mm of pedal travel. Under all conditions, after 20 mm of pedal travel, the brake light should already be on. This distance is measured starting from the center of the brake pedal.
Trouble-shooting
Malfunction | Her reason | Trouble-shooting |
A. One of the brake lights is off. | 1. Incandescent lamp burned out. 2. No ground contact. Do other incandescent bulbs in this lamp burn? If not: 3. Faulty wiring. | Replace. Check ground contact. Check wires. |
B. Both brake lights are off. | 1. Fuse defective. 2. Faulty brake signal switch. 3. See A 1 and 3. | Replace. Check, replace if necessary. |
C. Stop lights are on constantly. | 1. See B 2. 2. Brake light switch wires are direct contact. | Check wires. |