VSS I cannot located the Number 2 speed sensor. According to my Haynes manual there are 2 sensors, I know where the driven gear one is located, but I cannot find the other sensor.

The speedometer provides speed information based on a speed/distance pulse signal from the vehicle speed sensor (VSS). The VSS is mounted on the speedometer driven gear in the transmission.
or the gauge is bad .

• The speedometer/odometer is inoperative

• CJB fuse 14 (10A).
• Vehicle speed sensor (VSS).
• Circuitry.
• Instrument cluster.

• Go To Pinpoint Test E .

PINPOINT TEST E: THE SPEEDOMETER/ODOMETER IS INOPERATIVE CAUTION: Use the correct probe adaptor(s) when making measurements. Failure to use the correct probe adaptor(s) may damage the connector.
CONDITIONS DETAILS/RESULTS/ACTIONS E1 CHECK VSS SPEED SIGNAL BETWEEN CIRCUITS 679 (GY/BK) AND CIRCUIT 676 (PK/OG)
VSS C1088
Raise the drive wheels off the ground. While rotating the driveshaft, measure the AC voltage between the VSS C1088 pin 1, circuit 679 (GY/BK), component side and the VSS C1088 pin 2, circuit 676 (PK/OG), component side.

• Is the voltage between 1.3 volts AC to 6.1 volts AC?

Yes GO to E2 .

No CHECK and INSPECT the speedometer drive gear. INSTALL a new VSS if the speedometer drive gear is OK. TEST the system for normal operation E2 CHECK CIRCUIT 679 (GY/BK) AND CIRCUIT 676 (PK/OG) BETWEEN THE INSTRUMENT CLUSTER AND THE VSS

I would check the V S S or v Vehicle Speed Sensor

• OPERATION
• TESTING
• REMOVAL & INSTALLATION

Print

OPERATION

See Figure 1

Fig. Fig. 1: VSS with connector and driven gear
The Vehicle Speed Sensor (VSS) is a magnetic pick-up sensor that sends a signal to the Powertrain Control Module (PCM) and the speedometer. The sensor measures the rotation of the output shaft on the transaxle and sends an AC voltage signal to the PCM which determines the corresponding vehicle speed.

TESTING

1. Disconnect the negative battery cable.
2. Disengage the wiring harness connector from the VSS.
3. Using a Digital Volt-Ohmmeter (DVOM), measure the resistance (ohmmeter function) between the sensor terminals. If the resistance is 190-250 ohms, the sensor is okay.

REMOVAL & INSTALLATION

1. Disconnect the negative battery cable.
2. Raise and support the vehicle.
3. Remove the catalytic converter Y-pipe.
4. Unplug the VSS electrical connector.
5. Remove the VSS protective heat shield.
6. Remove the retaining bolt from the VSS.
7. Lift the VSS out of the transaxle.
8. Remove the driven gear retainer and the drive gear.

To install:

1. Inspect the O-ring on the sensor and replace if necessary.
2. Install the driven gear and the retainer.
3. Place the VSS into the transaxle.
4. Tighten the retaining bolt to 36-53 inch lbs. (4-6 Nm).
5. Install the VSS protective heat shield.
6. Attach the VSS electrical connector.
7. Install the catalytic converter Y-pipe.
8. Lower the vehicle.
9. Connect the negative battery cable.
ehichle speed sensor.

Hi there:
On 1999 Ford Taurus 3.0L EFI 6cyl the Vehicle Speed Sensor is Mounted on transmission. To removal procedure...

1. Disconnect the negative battery cable.
2. Raise and support the vehicle.
3. Remove the catalytic converter Y-pipe.
4. Unplug the VSS electrical connector.
5. Remove the VSS protective heat shield.
6. Remove the retaining bolt from the VSS.
7. Lift the VSS out of the transaxle.
8. Remove the driven gear retainer and the drive gear.

To install:

1. Inspect the O-ring on the sensor and replace if necessary.
2. Install the driven gear and the retainer.
3. Place the VSS into the transaxle.
4. Tighten the retaining bolt to 36-53 inch lbs. (4-6 Nm).
5. Install the VSS protective heat shield.
6. Attach the VSS electrical connector.
7. Install the catalytic converter Y-pipe.
8. Lower the vehicle.
9. Connect the negative battery cable.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

The Vehicle Speed Sensor (VSS) is a magnetic pick-up sensor that sends a signal to the Powertrain Control Module (PCM) and the speedometer. The sensor measures the rotation of the output shaft on the transaxle and sends an AC voltage signal to the PCM which determines the corresponding vehicle speed.

The Vehicle Speed Sensor is located mounted on transmission ...

Fig. VSS with connector and driven gear

Hope helps.

Wheel sensor use a magnetic pickup at the wheel.

The transmission has a VSS or Vehicle Speed Sensor installed on the area where the speedometer cable, gear usually is.

Speedometer Driven Gear REMOVAL & INSTALLATION NOTE: The 1992-95 S20 transaxle uses an electronic Vehicle Speed Sensor (VSS) and therefore the following procedure does not apply to it. Fig. 1: Speedometer driven gear assembly removal - GV and GW series transaxles

1. Raise the vehicle and safely support it with jackstands.
2. Remove the 10mm bolts and the holder plate.
3. Remove the speedometer gear holder.
4. Remove the driven gear from the holder. To install:
   
5. Replace the driven gear if worn or damaged.
6. Install the driven gear to the gear holder.
7. Install a new O-ring to the holder and lubricate it with oil.
8. Install the assembly in the transaxle aligning the slot with the holder plate.
9. Tighten the bolts to 9 ft. lbs. (12 Nm).

If the odometer and tripmeter stop incrementing their mile values, then the VSS or vehicle speed sensor is bad or has become disconnected.

Vehicle Speed Sensor OPERATION The Vehicle Speed Sensor (VSS) is a magnetic pick-up sensor that sends a signal to the Powertrain Control Module (PCM) and the speedometer. The sensor measures the rotation of the transmission output shaft or the ring gear on the differential and sends an AC voltage signal to the PCM which determines the corresponding vehicle speed.
TESTING

1. Disconnect the negative battery cable.
2. Disengage the wiring harness connector from the VSS.
3. Using a Digital Volt-Ohmmeter (DVOM), measure the resistance (ohmmeter function) between the sensor terminals. If the resistance is 190-250 ohms, the sensor is okay.

REMOVAL & INSTALLATION Fig. 1: Detach the connector for the VSS sensor
Fig. 2: Remove the retaining bolt for the VSS sensor and . . .
Fig. 3: . . . remove the VSS sensor from the transmission
Fig. 4: Pry the retainer for the VSS gear off and . . .
Fig. 5: . . . remove the gear from the VSS

1. Disconnect the negative battery cable.
2. Raise and safely support the vehicle securely on jackstands.
3. Detach the connector for the VSS.
4. Remove the VSS retaining bolt and remove the VSS from the transmission.
5. Remove the driven gear retainer and the drive gear. To install:
   
6. Inspect the O-ring on the sensor and replace if necessary.
7. Install the driven gear and the retainer.
8. Place the VSS into the transmission.
9. Tighten the retaining bolt to 98-115 inch lbs. (11-13 Nm).
10. Attach the VSS electrical connector.
11. Lower the vehicle.
12. Connect the negative battery cable.

On the transmission.

Removal & Installation 3.0L (Except SHO) To Remove:

1. Disconnect the negative battery cable.
2. Raise and support the vehicle.
3. Remove the catalytic converter Y-pipe.
4. Unplug the vehicle speed sensor VSS electrical connector.
5. Remove the VSS protective heat shield.
6. Remove the retaining bolt from the VSS.
7. Lift the VSS out of the transaxle.
8. Remove the driven gear retainer and the drive gear.

To Install:

1. Inspect the O-ring on the sensor and replace if necessary.
2. Install the driven gear and the retainer.
3. Place the VSS into the transaxle.
4. Tighten the retaining bolt to 36-53 in lbs. (4-6 Nm).
5. Install the VSS protective heat shield.
6. Attach the VSS electrical connector.
7. Install the catalytic converter Y-pipe.
8. Lower the vehicle.
9. Connect the negative battery cable.

sounds like your vehicle speed sensor is broken. here is a tutorial from autozone.com

OPERATION


The vehicle speed sensor is made up of a coil mounted on the transmission and a tooth rotor mounted to the output shaft of the transmission. As each tooth nears the coil, the coil produces an AC voltage pulse. As the vehicle speed increases the number of voltage pulses per second increases.

TESTING


See Figure 1

1. To test the VSS, backprobe the VSS terminals with a high impedance voltmeter (set at the AC voltage scale).
2. Safely raise and support the entire vehicle using jackstands. Make absolutely sure the vehicle is stable.
3. Start the vehicle and place it in gear.
4. Verify that the VSS voltage increases as the drive shaft speed increases.
5. If the VSS voltage is not as specified the VSS may be faulty.

Fig. Fig. 1: Vehicle Speed Sensor (VSS) and vehicle speed signal buffer wiring diagram

REMOVAL & INSTALLATION


See Figure 2

1. Disconnect the negative battery cable.
2. Disengage the electrical connection.
3. Unfasten the sensor retainers.
4. Remove the sensor and gasket or O-ring.

To install:

1. Install the sensor with a new gasket or O-ring.
2. Fasten the sensor retainers.
3. Engage the electrical connections.
4. Connect the negative battery cable.

Fig. Fig. 2: Vehicle Speed Sensor (VSS) location

This is what it looks like:

VSS with connector and driven gear

Here's the steps on getting to it and replacing it:

Removal & Installation

1. Disconnect the negative battery cable.
   
2. Raise and support the vehicle.
   
3. Remove the catalytic converter Y-pipe.
   
4. Unplug the VSS electrical connector.
   
5. Remove the VSS protective heat shield.
   
6. Remove the retaining bolt from the VSS.
   
7. Lift the VSS out of the transaxle.
   
8. Remove the driven gear retainer and the drive gear.
   

To install:

1. Inspect the O-ring on the sensor and replace if necessary.
   
2. Install the driven gear and the retainer.
   
3. Place the VSS into the transaxle.
   
4. Tighten the retaining bolt to 36-53 inch lbs. (4-6 Nm).
   
5. Install the VSS protective heat shield.
   
6. Attach the VSS electrical connector.
   
7. Install the catalytic converter Y-pipe.
   
8. Lower the vehicle.
   
9. Connect the negative battery cable.
   

The vehicle speed sensor (VSS) is located in the differential area of the transaxle. Also, to replace it should be fairly simple. I wish I could give a better answer exactly where it is at, but I have you the answer straight out of the Haynes manual.  

To replace the VSS, disconnect the electrical connector from the VSS. Then remove the retaining bolt and lift the VSS from the Transaxle or simply unscrew the VSS. Installation is the reverse of removal.