Did it turn the brake lights off? If it moved a lot higher it’s a sign that the pedal is softer than it needs to be. To test whether or not this is the case, put your feet behind your Yukon’s brake pedal and pull it up. This keeps the brakes lights on even when the switch is just fine. If the brake pedal is closer to the floor than it should be, the plunger in the brake pedal switch will no longer be able to be pressed in all the way. This keeps the brake lights perpetually on. If this adjustment is off, the plunger on the brake pedal switch will not press in all of the way. Nearly all brake switches have an adjustment built into them that allows them to to snug up to the pedal. Brake Switch Adjustment A typical brake light switch See Also: GMC Yukon Brake Pedal Going to FloorĢ. They are not very expensive, and they are easy to do yourself. Replacing the brake light switch is far and away the number one thing that fixes brakes that are stuck on. When this happens the brakes can stay on.
The inside of the brake light switch can wear out from the hundreds of thousands of times you press your Yukon’s brakes. When you take your foot off the brake, it presses this switch in and the brake lights turn off. When you press the brakes this switch is activated and the brake lights turn on. Underneath the dashboard there is a switch that the brake pedal presses into. They are written in order from most likely to least likely to be causing the problem.
Most of them are related to the switch that turns them on or off. Here are some of the most common reasons why your GMC Yukon’s brake lights may be stuck on. It’s a very simple system that has not changed in almost a century. When you press the brake pedal in, it sends the current to the brake lights. The most common reason that they stay on is a brake light switch that has failed.īrake lights work by having an electric current sent to the brake pedal switch at all times (even with the vehicle off). I have a dual-housing RV lamp with a three-position switch that also controls secondary work lights in the hatch, and a magnetic safety cut-off switch in the D-pillar and hatch panel to kill the hatch lights when the hatch is closed.It is both frustrating and unsafe to drive your GMC Yukon if the brake lights are stuck on. You can go really crazy with this if you want. The switch doesn't have to be fancy, just something to open and close the ground leg Another option is to find the wire in the D-pillar and put a small little switch there. Some people have wired small toggle switch from radio shack into the side of the lamp housing to provide the interrupt. However almost all of them have a broken switch, because the plastic tends to melt when the lamp is left on for extended periods. Usually there is a button on the lamp to interrupt the purple w/ yellow wire so that you can turn it off when neededĪlmost all of the XJs came with a switch on the lamp. The pink wire will provide battery constant power (so the lights will work when a door is opened), the yellow wire provides switched ground from the forward cabin (activated with doors and the dash light switch), and a purple wire w/ yellow stripe provides switched ground from the latch mechanism in the hatch (only activates cargo lamp). Typical setup for wiring is constant power with two switched grounds.
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