Speedometer does not work half of the time?

Tiny
DERIC MORROW
  • MEMBER
  • 1999 FORD F-250
  • 7.3L
  • V8
  • TURBO
  • 4WD
  • AUTOMATIC
  • 208,000 MILES
On my truck by speedometer does not work half of the time and then sometimes when I hit the brakes the speedometer will either jump up or jump down depending on whether it's working or not also my overdrive does not work when the speedometer does not work my cruise won't work when nothing is working either neither will my odometer can you help me
Tuesday, January 13th, 2015 AT 1:01 PM

2 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Scan for codes it may be a bad speed sensor or wiring issue to dash or dash itself.
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Tuesday, January 13th, 2015 AT 1:42 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
I would check the electrical connector at the rear on the instrument cluster for corrosion and If that is okay here is the location for the VSS which generates the signal for the speedometer. The sensor is in the tail housing for the transfer case. Check out the images (below). Please let us know what happens.
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Wednesday, November 6th, 2024 AT 1:49 PM

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