The polarity of probes on terminals doesnt matter because we are finding resistance. If you like me and dont have an alternate 12 volt power source to test your relay watch to see how to use your car as your power source and test your relay.
How To Test A 5 Prong Relay Grassroots Motorsports Forum
How to test a 8 pin relay with multimeter. To check the coils resistance with a multimeter take a multimeter and put it on the ohmmeter setting then connect the multimeter probes on any two terminals of relays coil. Multimeter used in video. This video shows you how an automotive relay works and how you can test it using an digital multimeter. You will need a 12v power supply or car battery and multimeter voltmeter. Turn back the relay to see pins located at its bottom part. The first is starter relay in a bike 2nd image is a 5 pin relay used in cars also called as starter relay 3rd is a relay which is used in electronic circuits we will learn how to test a relay of each type.
Set the multimeter to resistance measuring mode with a scale of 1000 ohm since the coil resistance normally ranges between 50 ohm and 1000 ohm. General and most common faults found in starter relay are at. The automotive test light should light. In the datasheet you will also get the tolerance value of the coil. You will find the resistance of the relay coil. Condition lost its movability carbon coveredrusty contact due to sparks pinout diagram with the notation.
Try to touch the probes of multimeter on a pair of pins of relay until the touched pair shows a resistance value but not zero. The first step is to test the coil of relay refer to the datasheet to get the coils resistance. I cover 34 and 5 pin relays and all you need is a 12v source a multimeter and a test light. Httpsamznto2kplxwf testing a relay is not as complicated as people think. It doesnt matter which probe is placed on which terminals. For example if the resistance is 320ω and the tolerance value is 10 then we should get resistance values somewhere between 288ω to 352ω.
How to test relay any relay voltmeter. Conditions burnt coil broken connection ii movable contact. Here is a video on how you can test a relay with or without a diagram. To check the relay coils resistance take the multimeter you have and place it in the ohmmeter ω setting and place the probe leads of the multimeter on the 2 terminals of the relays coil. Automotive test lights are available at auto parts stores and hardware stores. With the relay in the configuration that has the 2 load pins connected place the test voltage on 1 of the load pins of the relay and an automotive test light on the other load pin of the relay.
This is the easiest way to do it out of the car and the only way it should be done.
Gallery of How To Test A 8 Pin Relay With Multimeter
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