Question about 2001 Ford Excursion

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Speedometer doesn't work after I blew a front tire. Where does it hook to transmission? the odometer doesn't work either.

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Wheel speed sensor wires!

Posted on Nov 09, 2010

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Posted on Jan 02, 2017

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Speedometer won't work in 97 Astro, replaced sensor..help


What sensor ? VSS - vehicle speed sensor on the transmission ? Colud be the speedometer gauge is bad . Do you know how the insturment cluster get's that info. ? Your best bet , take it to a qualified repair shop . You have no idea how it works , don't have the diagnostic tool's to find the problem ,so do yourself a favor . The first step would be to hook up a factory or professional type scan tool to see if the VSS info is seen in the VCM ,then to see what the VCM is sending over the serial data network . Do you know what a serial data communication network is ? VCM is vehicle control module .
Speedometer and Odometer Circuit Description
An electronic speedometer is standard equipment on all models. Integrated circuits control the air core speedometer and the stepper motor odometer. Removable bulb and socket assemblies provide the lighting. The socket assembly inserts into the back of the instrument cluster.
The speedometer system consists of the following components:
• The instrument cluster
• The vehicle speed sensor (VSS) calibrator
• The VSS
• The related wiring
The VSS calibration is part of the VCM that changes the analog output from the VSS to a digital signal. The digital signal contains 4000 pulses per mile (PPM) for the instrument cluster. The VCM sends the signal to the speedometer through CKT 389. The VSS calibration matches to the final drive and the tire size of each vehicle. Reprogram the VCM with the proper VSS calibration if the final drive or tire size changes for any reason. The signal will not be accurate for the proper speedometer/odometer operation if the necessary change is not made. An incorrect VSS calibrator can also affect the following components:
• The antilock brakes
• The vehicle control module (VCM)
The cruise control systems
The VSS calibration is programmed into the VCM. Do not service the VSS calibrator separately.
The VSS is a permanent magnet signal generator that sends an analog signal proportional to the propeller shaft speed to the VCM. The VSS mounts to the transmission tailshaft extension housing on the two-wheel drive model. The VSS mounts to the transfer case output shaft housing on the all-wheel drive models.


Use a Scan Tool in order to read the vehicle control module (VCM) diagnostic trouble codes.
Are there any vehicle speed sensor related trouble codes?
Testing an not guessing fixes problems

Sep 19, 2017 | 1997 Chevrolet Astro

1 Answer

Transmission speed sensor


You could have a faulty speedometer/odometer combination meter causing a false Vehicle Speed Sensor error.
My 1998 Sienna had the following symptoms:
- Speedometer and odometer failed intermittently
- The check engine light would come on and I would get a p0500 code in the OBDII.
- The cruise control would stop working at the same time the speedometer failed.
There is a speed sensor in each one of the tires and they feed the speed information to the ABS ECU. From the ABS ECU the speed signal goes to the speedometer/odometer combination meter, and from there it goes to the Engine Control Module and to the Cruise Control ECU. I could see a signal coming into the speedometer/odometer, but no signal going out. Replacing the speedometer/odometer combination meter fixed the problem.

Dec 01, 2013 | 1998 Toyota Sienna

1 Answer

My 97 volvo was in an accident before i bought it and my speedometer works but my odometer doesn't what or where should i begin looking to fix it


The speedometer works from the speed sensor (top of transmission casing, near engine. The Odometer must run from a cable from the transmission housing toward the firewall and the instrument cluster. The cable is either disconnected, broken or worn. You need the disconnect it and turn it with a drill to see if it works.
Source : I had a mazda where the cable became all rounded up where it connects into the transmission, I had to change the odometer cable. I did however change the speed sensor on my 94 850.

Feb 19, 2013 | 1997 Volvo 850

1 Answer

Speedometer doesn't work


If the speedo does not work but the odometer does, the problem may be in the speedo head on the dash. If the odometer also does not work the problem may be the speed sensor in the transmission.

Jan 26, 2013 | 2004 Chevrolet Suburban

1 Answer

I have a1995 ford f-150 that speedometer and odometer doesn't work. It has a 4.9 IL 6 and 5 speed manual transmission.


there is a speed sensor on the transmission on the back of it and if its a 4x4 it on the transfer case

May 31, 2012 | 1995 Ford F150 Styleside Regular Cab

1 Answer

What's the problem when your odometer reading


are you saying that the odometer does not roll over the miles and that the speed of water does register the current speed?
Usually if the odometer is not working it is a problem inside the speedometer unit in the dash.If neither is working then you may have a broken connection to the unit on the transmission that sends electrical information to the speedometer.I hope this helpsregards

Feb 22, 2012 | 2001 Oldsmobile Intrigue

2 Answers

Speedometer and Odometer quick working. How do I


Follow the speedometer cable from the firewall, down to the transmission. It should bolt in the transmission, remove the cable from the transmission, and turn the gear to check to see if speedometer is working, if not, it's most like the speedometer head unit.

Mar 15, 2010 | 1990 Geo Prizm

1 Answer

My 87 cherokees speedometer and odometer dont work does any one have a suggestions for this


Your cable probably came loose from the transmission or the speedo. If the cable is good, then you probably blew the speedo. It happens.

Apr 29, 2009 | 1987 Jeep Cherokee

1 Answer

81 corvette speedometer and odometer quit working


unhook speedometer cable from transmission and spin cable by hand it should turn smoothly if it des hook end to a low sped drill and see if it holds at a steady speed if it does the the problem is in the plastic speedo gear in the trans if it dos not remove the dash and inspect the connection on the speedo head

Oct 17, 2008 | 1981 Chevrolet Corvette

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