Coolant temperature gauge. When the pointer needle is constantly at the beginning of the scale, disconnect the wire from the pointer sensor with the ignition on and connect the wire tip to «weight».
If the arrow deviates, the sensor is defective and must be replaced. When the pointer is constantly in the red zone, disconnect the wire from the sensor with the ignition on. If the needle returns to the beginning of the scale, the sensor is faulty. If the arrow remains in the red zone, then either the wire has a short circuit with «weight», or the instrument is damaged.
Fuel gauge. The procedure for checking the fuel gauge is similar to that described above for the coolant temperature gauge.
If the pointer needle is constantly at the beginning of the scale and does not deviate after shorting to «mass» corresponding contact in the block of the electric fuel pump, then it is necessary to check the device.