Speedometer, odometer, cruise control and overdrive not working

Tiny
DURAMAXDIESEL09
  • MEMBER
  • 2001 FORD F-150
  • 4.6L
  • V8
  • 4WD
  • AUTOMATIC
  • 230,000 MILES
Speedometer quit working, odometer not counting mileage, cruise control does not work, the overdrive light flashing, ABS light on, no check engine light or fault codes. All of this happened at the same time while pulling a trailer with a moderate heavy load. Truck still runs great and shifts good. I just have no speedometer, no cruise, no overdrive, and odometer has stopped but still lit.

I started by replacing the rear ABS sensor on the differential. This did not help. I tested for AC voltage on both ABS wheel sensors in the front of the truck. The driver's side did not show voltage when I spun the hub, but the passenger side did show some AC voltage (.3XXXX). I understand the driver's side sensor is bad but has been for quite a while now. The ABS light has been on since last winter. All fuses in the engine and cab fuse boxes checked good.

The local Ford technician at the dealership used his computer to monitor the ABS sensors while driving it around the car lot. He said none of the sensors are showing the same speed while driving. He seems to think the ABS control module is bad.

I am trying to fix this problem myself without having to pay the dealership big money to track down the problem and fix it. Please help if possible. Thanks
Tuesday, August 22nd, 2017 AT 8:35 AM

2 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
My main concern is the speedometer not working which will cause all of the problem listed above. Start by replacing the vehicle speeds sensor (VSS) which is located at the rear of the transfer case.

Here is a diagram to help you see what I am talking about (below):

Please let us know what happens.

Cheers, Ken
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Wednesday, August 23rd, 2017 AT 10:47 AM
Tiny
STEVE W.
  • MECHANIC
  • 13,464 POSTS
The speedometer/odometer and cruise don't use the ABS sensors, they use a speed sensor on the transmission. You would need a scan tool with live data to determine if that signal is getting to the dash. If it is then it is likely that the instrument panel is faulty but it needs to be tested before being condemned. That sensor may also be the cause of the OD light flashing.

For the ABS, if none of the sensors read the same speed and the tires are all the same size and inflated properly, it is likely the module itself.
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Wednesday, August 23rd, 2017 AT 10:56 AM

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