Ford Ranger Forum - Forums for Ford Ranger enthusiasts!

Go Back   Ford Ranger Forum - Forums for Ford Ranger enthusiasts! > >
Forgot Password? Join Us!

Welcome to Ford Ranger Forum

Thread Tools Search this Thread

Old 03-11-2010, 07:41 AM
Ruff Ruff is offline
Learning to use the forums
Join Date: Mar 2010
Posts: 1
Default Speedometer Problem

A bit of history to start.
Last fall the truck (info below) wasn't shifting gears so I took it to Aamco and there was water in the tranny fluid, so they rebuilt the transmission, installed a new rad for the tranny oil, and replaced the vehicle speed sensor.
In January it started again with the speedometer either not reading at all or jumping erratically at low speeds, so that the transmission wouldn't shift. Aamco said the battery voltage was low and the VSS acts up at low voltages, so now the truck has a new battery and a new alternator. Things seemed okay for a while, but now, every once in a while, when the truck accelerates from a stop the speedometer won't move, and then at about 20 -30 mph it starts to work, and the transmission shifts.

My only guess is a bad connection somewhere between the VSS and the engine computer, and maybe I should run new wires between them. But with only a Haynes manual I have no wiring diagrams to follow.

So, any thoughts as to a solution? I'm open to any ideas
If you think it's wiring, has anyone tried Are their wiring diagrams worth paying for a subscription?
Overall I'm not impressed with Aamco so I'd rather not go back there.
1999 Mazda B3000 ext cab 4x4
3.0L V6 Auto
It may be a Mazda on the outside, but inside everything is stamped Ford
Reply With Quote

speed sensor, vss

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
speedometer jumps RangerLuc Electrical Tech 10 09-11-2013 09:10 PM
speedometer HELP camoman Electrical Tech 3 11-25-2009 04:58 AM
Speedometer is off, at best Momboy007 General Tech 3 11-14-2009 11:10 PM
97 ranger speedometer problem Nowaynoah Electrical Tech 0 11-08-2009 09:46 PM
ABS AND Speedometer Jackal General Tech 1 06-24-2009 07:54 AM