schematics and diagrams: car speedometer

Odometer and Speedometer Not working on Mercury Tracer

The speedometer and odometer are electrically driven by sensor.
These sensor is called Vehicle Speed Sensor (VSS)

Typically it will be the Speedometer / Instrument Panel or the VSS causing the problem of speedometer not working.
But it can also be the fuse issue,inspect the mentioned fuses :----

Test Fuses :
OBDII located in the Under Hood Fuse Panel
METER located in the Inside Fuse Panel

See the Fuse location and VSS wiring diagram for 1998 Mercury Tracer Vehicle:-----

Mercury Tracer wiring diagram

These diagram will help.
Thanks.

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Replacing instrument cluster/instrument panel is not very easy.But with proper procedure and details,its possible.
The details are as follows :-----

yes, the radio has to come out, as 2 of the trim panel screws are hidden by the radio.

This same instructions are for 1990-95 Accord
See Figures 7, 8 and 9

Disconnect the negative battery cable. If so equipped, disable the Supplemental Restraint System (SRS).
Lower the steering wheel to its lowest position.
Remove the center console.
Remove the ashtray and ashtray holder.
Remove the radio/tape player.

Remove the coin box, switches and dash light controller from the instrument panel.
Remove the mounting screws securing the instrument panel. This is a large, formed piece of plastic-don't crack it.

Fig. Fig. 8: Instrument panel retaining screw locations on 1994-95 Accords

Lay a protective piece of cloth over the steering wheel pad.
Remove the four screws holding the instrument cluster. Pull the cluster forward enough to allow access to the wiring connectors.

Fig. Fig. 9: The instrument cluster is retained by four screws

Disconnect the wiring harnesses and remove the instrument cluster.
Individual instruments may be removed from the cluster after it is removed from the car. Avoid damage to any terminals or the printed circuit board.

To install:

Install the gauge cluster; connect the wiring before it is fully in place. Install the retaining screws.
Install the instrument panel. Make sure it is correctly placed. Install the retaining screws.
If applicable, install the air vents.
Install the coin box, switches and dash light controller.
Install the radio, ashtray holder and ashtray.
Install the console.
If applicable, enable the SRS.
Connect the negative battery cable.

This details will help.

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