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oil pressure and water temp gauge in one gauge
We have multi function auto gauge which include the oil pressure and water temp gauge. Also it include the fuel level gauge and voltmeter. The multifunctional gauge can save space. And it is cheap than separate ones.
About the oil pressure and water temp gauge in one, when the engine is working, If the oil pressure gauge pointer is at "The outer side of the 0,. position does not move, which is generally caused by the open circuit of the wire from the ignition switch to the oil pressure gauge or the burning out of the internal resistance coil of the sensor and the oil pressure gauge. The red light is always on, the engine is turned off, and then the ignition lock is opened. Remove the wire on the sensor terminal, and the light is still on, indicating that there is a ground connection between the wire between the indicator and the sensor. If the light is not on, the bulb is burned out or the sensor is faulty. The sensor is installed in the correct direction. In order to avoid the direct radiation and heating of other parts by the hot air flow of the bimetallic sheet heated inside the sensor. After the oil pressure gauge or coolant temperature gauge is installed, the two terminals can be wired at will, that is, one is connected to the ignition switch and the other is connected to the sensor. No matter how connected, the current in the circuit will not change, so its indication value will not be affected.
After the fuel gauge is installed, it cannot be wired casually, that is, the upper terminal must be connected to the ignition switch, while the lower terminal can only be connected to the sensor. Otherwise, The pointer will always point "0. Voltmeter: the so-called voltmeter, of course, measures the voltage of the car battery. The installation of this meter is the simplest. There are two power lines and two light bars. It is OK to connect the positive and negative poles of the power supply. After installing the oil temperature gauge or oil pressure gauge, if the pointer cannot reach the top, connect a ground wire on the sensor to the body ground of Digital meter. The installation of the tachometer is also relatively simple. Normally, there are also two light wires, two needle wires. Generally, the red wire is connected to the positive pole, and the black wire is connected to the negative pole. But the only difference is that a signal line needs to be connected somewhere.
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