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Step 1
Place your car on a hydraulic lift. Raise it high enough that you can get underneath.
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Step 2
Locate the car's rear axle. The control module for the anti-lock brake system is located near the rear axle on most models of car. You'll know you have found the rear axle when you see a tube running from wheel to wheel in the rear of your car.
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Step 3
Look behind each wheel on the right and left and locate the brake system. The brakes will be directly linked between the axle and the wheel and normally consist of a metallic disc and a clamping system.
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Step 4
Find the wiring that runs from the brakes. You'll also see your car's brakeline running out of the brakes. You will know the anti-lock brake wires because they will be thin electrical wiring, not plastic tubing.
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Step 5
Follow the wires until you find a small box tucked into the car's frame. You may need to use a flashlight, depending on the model of the car. This box will have several wires running from it.
