1991 Dodge Dakota 5.2 ltr
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The antilock controller is up behind the dash on the passenger side. There's not much in the way of sensors...there's a speed sensor on the differential, and a connection to the rear proportional valve on the driver side frame in the rear. The speed sensor most often fails. There's a black wire with a single free connector (not connected to anything) below the dash on the passenger side that's the diagnostic pin for the anti lock controller. Turn the ignition on, ground the plug, and the ABS light will flash a certain # of times for a code. I posted the list of codes on here previously, if you search by my username and anti lock.