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dog doctor

dog doctor 4

Posted

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.

Bigbob50

Bigbob50 0

Posted

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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