Need help on 99 f-250

Super_M · #1 (**permalink**) 08-08-2009, 07:32 PM

What could the problem be on a 99 f-250 7.3 when the abs light comes on and the speedometer stops working and the overdrive off light is flashing at me. Everything works fine the overdrive still works the truck still drives good and shifts good.

***NCHornet*** · #2 (**permalink**) 08-09-2009, 04:44 AM

Does your speedo function correctly? If the OD light is flashing you have driveline codes, I would get them read first. Could be a simple VSS gone bad on the rear pumpkin.

NCH

Super_M · #3 (**permalink**) 08-09-2009, 06:09 AM

No my speedo does not work at all when if first quit it would flicker a little then go down to 0. Sorry but what is a VSS?

7004 · #4 (**permalink**) 08-09-2009, 06:13 AM

rear speed sensor

dmd · #5 (**permalink**) 08-09-2009, 11:03 AM

Vehicle Speed Sensor is in the rear end. It is a sensor that tells the computer how fast
the truck is moving. Probably just needs to be pulled out and cleaned.

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