R: Tachometer Always Indicates Too High or Too Low, No Tach Indication/Tach Indication Erratic

R1 CHECK WIRING


^ Make sure engine is not misfiring.


^ Disconnect battery ground cable


^ Remove instrument cluster.


^ Using Rotunda Digital Volt-Ohmmeter 014-00407 or equivalent, measure resistance between connector B Pin 20 and coil.


^ Wiggle connections and wiring near coil to check for intermittent connection.


^ Is the resistance less than 100 ohms?


Yes


REPLACE instrument cluster. RECHECK operation.

No

SERVICE wiring Circuit 11 for open circuit.