![]() ![]() ![]() How to replace a brake light switch yourself? If the stopper is missing, replace the stopper before condemning a faulty brake light switch. When you adjust the brake light switch, ensure it is pressed against the brake light stopper. Most brake light switches will allow you to adjust them slightly to accommodate normal wear. This problem can often be fixed by adjusting the position of the brake light switch. When this happens, the brake light will stay illuminated at all times. Over time, this stopper wears out or can also come out of place. ![]() There is a brake light stopper with which the brake light switch comes in contact when the pedal is not pressed. The brake pedal stopper can also contribute to a brake light staying on. Use a voltmeter and probe the power source area. Locate the wire connector that plugs on the brake light switch. Suppose the brake lights work properly test for brake light switch power. If there is no reading, the brake light switch is open therefore, it is faulty. There should be a continuity reading of zero on at least one of the pins. Probe one of the pins with the multimeter’s negative side and the positive side touching each of the pins on the brake light switch. There are two, four, or up to six pins on most brake light switches. In some cases, you will need the brake light switch diagram, which may be printed on the brake light switch itself. The brake lights may work properly, but the brake light switch may still be defective and need replacement.Ī better way to check for a faulty brake light switch is to remove the brake light switch from the brake pedal and check for continuity. The brake light switch has several contacts, as shown in the picture below. How to check if the brake light switch is bad?īy pressing the brake pedal and checking the brake lights, you can not determine if the brake light switch is defective in modern vehicles. One of more of these symptoms can be caused by a bad brake light.
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