Speedo quit/sensor changed

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Replaced speed sensor on diff.Still has ABS,Brake,and check engine icon lights, and no speedometer.Will clearing the codes,on a scanner, fix it now? NO! Update: 05/13 Changed transmission sensors too, no change.reset computer, blew out connector on ABS unit as recommended, nothing seems to work. I am now suspecting a wiring harness to the diff sensor.