Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Speedometer Module: Description and Operation

The Speedometer and Odometer receive a signal from the Vehicle Speed Sensor (VSS) on circuit G7. Circuit G7 is spliced and also connects to the Powertrain Control Module (PCM).

Circuit F14 from the fuse block provides voltage for the tachometer. Circuit Z11 provides ground for the tachometer.