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1976 R Model Mack Sensor

Don Wilson jr


I have a 1976 R Model that has sensors on the front and rear brakes. Question, are these ware sensors or ?.

Thanks Don


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I think you are talking about the early abs brake system installed on 76-78 trucks. If still complete there should be wires from sensors to a relay valve on frame or crossmember.

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They are for ABS I have a 1977 we removed the wires completly the brake relay valve between the tamdems was also replaced with a standard universal one with no ABS wires on it.

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