The tachometer gets its signal from the computer or the ignition coil pack ground circuit. (yourmechanic.com)
Possible Causes: Inertia fuel shutoff (IFS) switch needs to be reset Open FPDM ground circuit Open circuit to FPDM PWR RLY Open FPDM PWR circuit Open or shorted FPM circuit (engine should start) Damaged IFS switch Damaged FPDM PWR RLY Damaged FPDM Damaged PCM Also for Mustang: Open B + circuit to the constant control relay module (CCRM) pin 11 Open ground to CCRM pin 18 Damaged CCRM (mechanics.stackexchange.com)
What we do know from our first drive — behind the wheel of a European - spec left - hand drive manual pre-production five - door prototype for just three laps of Mazda's 3.3 km Mine proving ground circuit — is that the new 2 makes big strides in cabin space, refinement and quality. (motoring.com.au)