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METERS AND GAUGES DI-5 C D E F G H I J L M A B DI The water temperature gauge is regulated by a variable ground signal supplied ● to combination meter terminal 46 ● through thermal transmitter terminal 1. As the temperature of the coolant increases, the resistance of the thermal transmitter decreases and the nee- TACHOMETER The tachometer indicates engine speed in revolutions per minute (rpm). ● to combination meter terminal 48 for the tachometer ● from ECM terminal 3. SPEEDOMETER The vehicle speed sensor provides a voltage signal to the combination meter for the speedometer. ● to combination meter terminals 34 and 35 ● from vehicle speed sensor terminals 1 and 2. The unified meter control unit converts the voltage to the vehicle speed and displays it on the speedometer. |