One way to find out which is the brakelight fuse us with the car turn off. have an assistant depress the bake pedal then releasing it. While they do that use a volmeter with one lead to the ground while the other end pokes the top of the fuse with the metallic part. The fuse the gets 12volt reading when the brake is depressed is the brake light fuse. When the brakes are released, the 12volt should not be present.
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