Component Tests: Tachometer
WARNING: This page is about a different car, the 2002 Subaru Outback and 2002 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.
Measure tachometer resistance. See Figure and TESTING SPEEDOMETER & TACHOMETER table. If no good, replace tachometer and water temperature gauge assembly. If OK, replace combination meter printed circuit.