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water temp oil pressure combo gauge
The diesel engine shall first install an oil pressure gauge on the instrument panel, and then connect the oil pipe to the oil filter element along the concealed line, and install it at the position of the pressure sensor. The water temperature gauge of diesel engine can be connected to the water temperature gauge at the water inlet of the water pump or at the water outlet of the cylinder head.
When the engine is working, If the pointer of the oil pressure gauge is "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 of the sensor and the internal resistance coil of the oil pressure gauge. The red light is always on, and the ignition lock is turned on after the engine is turned off. Remove the wire on the sensor terminal. The light is still on, indicating that the wire between the indicator and the sensor is grounded. If the light is not on, it means that the bulb is burnt or the sensor is faulty. The installation direction of the sensor is correct, but In order to avoid that the hot gas flow inside the sensor that heats the bimetallic sheet does not directly radiate and heat other components. After the oil pressure gauge or coolant temperature gauge is installed, the two terminals can be connected randomly, that is, one is connected to the ignition switch and the other is connected to the sensor. Because the current in the circuit remains the same no matter how it is connected, it does not affect its indicated value.
When installing the water temperature gauge, connect a ground wire from the screw on the water temperature tee to the body ground. Oil pressure gauge: after installing the oil pressure gauge, when the pointer cannot reach the top, it is also necessary to connect a ground wire on the sensor to the body ground. The water temperature sensors work under different voltage conditions. The sensor for the water supply thermometer is 12V, while the sensor for the engine control unit is 5V, so they are not interchangeable. Moreover, their plug shapes are different. The difference between them is simple: the plug of the former has only one wire, while the plug of the latter for the engine control unit has two wires. Don't make mistakes.
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