80mm Car Modified LED Tachometer with Self-check Function, Tachometer TWS Earphone Double-port Miller pliers: used to

80mm Car Modified LED Tachometer with Self-check Function, Tachometer TWS Earphone Double-port Miller pliers: used to1. Independent instrument, no control unit required. Installation: red positive, black wire is negative, yellow light is positive power wire, white wire then turn signal wire number, or connect to ignition coil negative (negative ignition coil wire), also can connect to signal wire to crankshaft position sensor we It is generally recommended that car owners go to a repair shop or refit shop to complete the installation of the tachometer, because the

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