Coolant flows even with a non-operating temperature gauge.
The temperature gauge, assuming stock, is supplied 7 volts from the 7 volt regulator and the amount of current depends on the resistance in the temperature sensor. Failure points include the 7 volt regulator, the gauge itself, the temperature sensor and the wiring connecting the components.
An excellent accompaniment to the Haynes manual is the factory service manual, available for free download.
The temperature gauge, assuming stock, is supplied 7 volts from the 7 volt regulator and the amount of current depends on the resistance in the temperature sensor. Failure points include the 7 volt regulator, the gauge itself, the temperature sensor and the wiring connecting the components.
An excellent accompaniment to the Haynes manual is the factory service manual, available for free download.