12 pin 175965-2 Automotive Electric Cable Socket Plastic Female Male Connector With Terminals 1.2 Series

2.7.3 Essentials for Relay Electric
(1) The simple judgment method of the working performance of the relay connects the ignition switch, and then listen to the control of the relay with the ears or steenper, or feel the vibration of the relay with the hand of the relay. If so, it means that the work of relay is basically normal, and the use of electrical appliances is caused by other reasons, otherwise it will indicate that the relay work is abnormal.
You can also pull out the relay for testing. For example, if the air -conditioning compressor fails to work, you can start the engine, then connect the wind turbine switch and the air conditioner switch, and then remove the interpolation of the air conditioner compressor relay to judge. If the sound of the relay movement can be heard, and the speed of the engine decreases significantly when pulling off the relay, the engine speed of the engine is increased when inserting the relay, indicating that the relay and its control line of the air conditioner compressor are normal.
Regarding the position of relay places, relays and conservators, which are a bit scratched on the circuit schematic diagram, are generally arranged in the central distribution box.
(2) Common faults of common faults of relays are: coils, short -circuit (insulation aging), contact ablation, thermal decay, and unable to adjust the initial action current.
① Burning the relay coil. In order to prevent this, when maintenance, maintenance and welding, if the temperature may exceed 80 ° C, it should be removed from the relay and electrical control unit that is more sensitive to temperature.
② Frequent contact. For example, the relay of the Golden Cup Sea Lion Cars (using a 491Q -ME engine) air -conditioning condenser fan is just under the glass cleaning pipe. If the water spray pipe is broken, the cleaning solution will be leaked to the relay, so that the frequent opening contact of the relay can not be disconnected, which will cause the air -conditioning condenser fan to constantly turn. Therefore, it should be strictly prevent relay into water.
(3) ECU's adverse iron may affect the normal work of relay. A Shenlong Fukang 988 sedan. During normal driving, the engine automatically turns off and starts again. Connecting the ignition switch, the sound of the fuel pump can not be heard, and there is no electric spark in the spark plug. The ignition coil was detected and found that there was no power on the plug, but the resistor on the first and secondary side was normal. Measure the car's spray dual sealing relay, and its plug has a 12V power supply. Replace the spray dual -seal relay, there is still no electric spark, and there is no sound of relay suction. Use a wire to directly use the 10th foot of the jet dual -seal relay to the iron directly. You can hear the sound of relay suction, and the engine has also been successfully started. But it is strange that the engine does not turn off the iron wire, the engine does not turn off, and the ignition switch is turned off. After the engine is restarted, it is normal.
Analysis of the medium reason. This is because the engine ECU is not good at the iron and iron, which causes the power supply voltage of the relay coil to be very low (sometimes only about 2V), which is impossible to suck the relay at all. After using the wire directly, the relay has a 12V voltage, so it successfully sucks the combination, so the engine starts successfully. After removing the temporary iron wire (the ignition switch is still in the connection), there is still a lower voltage on the relay (this is the characteristics of the relay shared). Open, so the engine does not turn off the fire.
Turn off the ignition switch. The self -sensing force generated by the circuit is much higher than the power supply voltage. Under the action of this powerful electrical momentum, the poor -handed railway may return to normal, so the engine is normal after starting. However, the above failure will be reproduced, so the method of eradication is to completely deal with the poor part of the iron.

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