Genuine Chevrolet Trailblazer Brake Light Switch

Chevrolet Trailblazer Brake Light Switch Parts Questions & Experts Answers

• Sensor Kit,Brake Pedal Position
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  Q: Is the brake light switch adjustable, and what should be done if it fails on Chevrolet Trailblazer?

  A:

  This is not an adjustable switch and on failure; it is recommended it be replaced on these vehicles. It is installed on the side of the Brake Pedal arm and fixed by the same clip used to fix the booster pushrod to help activate the brake lights when the brake pedal is pressed. To get to the switch, one has to take off the left side under-dash panel heater/ ac duct. If the brake lights are dead, the first thing that the individuals should do is to look at the fuse. In as much as the fuse is good, voltage should be tested on the feed wire of the switch; if no voltage is; it means there is need to fix the wire adjoin the switch and the fuse box. If output voltage is detected, more specifically, the brake pedal must be pressed to verify for voltage at the terminal of output wire; else, the switch is bad. If there is voltage at the output, then you have to check for power at the brake light wires in the tail light housings as the brake pedal is pressed; if there is no power, the circuit between the switch and the brake lights is bad. For voltage, a bad ground should show by touching the ground wire terminal on the tail light connector with a jumper wire connected to a good ground; if the brake light comes on, then there is a problem with the ground circuit. It is also very important to bear in mind that although the brake light bulbs I spoke of could be burnt, it is also improbable for all the bulbs to be burnt at the same time. For replacement, in case it has not already been done; remove the left side under-dash panel and the heater/air conditioning duct; then retract the electrical connector from the switch; the clip that holds the switch and pushrod to the pin on the brake pedal arm has to be removed; finally the brake light switch have to be slipped off from the pin. When it comes to installation of the new switch the process should be as follows: The retaining clip should be properly fixed.