how to test a 4 pin relay with a multimeter

Turn your multimeter on and set it to the ohms setting. The ohmmeter measures resistance in Ohms (Ω). Unfortunately, if you test a relay using this continuity method it will not reveal any turns of the coil that has been shorted. if the bulb lights, it means the relay is working. However, when the relay is supposed to be activated, I suddenly get a 5v reading. Before testing any relay you need to know about the relay itself. You will notice that even if the battery is new and working fine it is always drained of power especially in the mor… You need to know about the nominal value of the coil resistance from its datasheet. The purpose of testing a relay is to find, whether it is good or bad . Some manufacturers place a diagram and pin ID on the outside of the relay case to show which pins are part of the control circuit and which pins are part of the load circuit. it's pin configuration like a number of pins, on which pin relay coil is connected. Nov 14, 2015 - Here is a video on how you can test a Relay with or without a diagram. Position the relay on the floor, counter or table so the "s" and "m" terminal are facing down. EE-Tools, Instruments, Devices, Components & Measurements, Testing Solid State Relay in Diode Test Mode (DMM), Different Types Of Relays, Their Construction, Operation & Applications. 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. The majority of vehicles made today have the fuel pump relay located near here, and the fuel pump relay should look like a small plastic box with four to five electrical terminals. IV. Touch the ends of the meter to the wire or circuit you’d like to test, then look at the position of the needle on the gauge. A relay that passes this test will probably be ok, but if you still suspect the relay you can easily verify finer electrical properties by continuing. With the relay removed from the fuse box, the multimeter set to measure DC voltage and the switch in the cab activated, first check to see if there are 12 volts at the 85 position in the fuse box where the relay plugs in (or wherever the relay is located). 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 main purpose of this test is to check the continuity of the coil. Set the multimeter in continuity test mode. If the resistance is very low or very high, the coil most likely has short turns or opened respectively. Connect the red positive probe of the multimeter to the other end of the same wire; connect the multimeter's black probe to the car frame. General and most common faults found in starter relay are at: i) Coil: (conditions- burnt coil, broken connection) If the light bulb turn ON and OFF respectively, Relay is in good condition otherwise, relay is damaged and you need to replaced with new one. To test a solid state relay, follow figure and steps given below. The NC terminal remains closed until the relay activates. Related Post: How to Find the value of SMD Resistors. Follow, © Copyright 2020, All Rights Reserved 2012-2020 by. Activated mode: when the coil is energized, the current will only flow from common terminal to NO terminal. In this reading .6 is … If they are the same or close, the wire is fine. Keep the multimeter in the continuity check mode. A good relay has NC terminal resistance of 0 Ohm when deactivated & infinite resistance when activated. Each circuit uses electrical wires to carry both power and signal information to other components. Once you locate the relay, you have three methods to test it. they turn on the relay. If the meter does not show any sign of continuity, the relay conductors are damaged. Step 1: With the relay in any position, check if there is continuity between terminals 1 and 2 of the relay. Do the test with a multimeter Electromechanical Relay EM. Remember, do not use this method unless you have got the technical skills of using a power source taking the necessary safety precautions. if there is no information about its terminals then you can identify it using an Ohmmeter. NC and NO pin. Insert the multi-tester with one probe on each of the "s" and "m" terminals. – Examples in British and SI System, Thevenin’s Theorem. Place the meter's test wires across the power and control terminals. To test relay coil using multimeter put a multimeter on ohmmeter settings, and measure resistance between coil contact. Fig. Over time, these wires can become damaged due to misuse, accidents and component failure. One thing commonly tested on heavy-duty trucks is the 5-pin relay. Step 2 25% Off on Electrical Engineering Shirts. If you choose to test a relay using Ohmmeter, you need to do a tad bit of research beforehand. – NPN & PNP, Testing Electrical and Electronics Components and Devices with Multimeter, How to find The value of Burnt Resistor ( By three handy Methods ). You will find the resistance of the relay coil. Using a multimeter The only tool required to check a relay is a multimeter. The first terminal “1” of Relay should be connected to the bulb and AC voltage while the second wire from outlet will be connected to terminal “2” to complete the circuit as shown in fig below. This test is performed to examine the coil condition (, The main purpose of this test is to check the, If your meter does not have a continuity function or for some reason does not show any sign of continuity then use the, Unfortunately, if you test a relay using this continuity method it will, However, most of the time the resistance of the coil lies beneath. Find the "s" and "m" plug-type terminals and the "L" slip-on terminal. RELAY TEST 4 with TEST LIGHTor light bulb Supply power 12 volts to 86 and Gnd to 85, this circuit ENERGIZED Supply 12 volts to pin 30 Ground your test light and TOUCH 87 to see light come on. Once the relay has been identified, gently grasp or touch the relay in question, have a helper turn the … If multimter shows “0” or “OL”, its mean that the relay is damaged and faulty. field which attracts a movable lever (pole) to change the switch position. 2. Your email address will not be published. In this case, the meter should read "Open Circuit." If the meter reads "Open Circuit" or some other very high reading, the wire is bad and requires replacement. The most effective way to bench test a solid state relay is to construct a simple test circuit consisting of a DC power supply or battery (a 9Vdc battery will work fine in most cases) and a 60W or 100W light bulb. – NPN & PNP. So it is crucial to test a relay if it stopped working before you replace it or throw it away. Usually, the terminals are specified on the protective cover of the relay. Turn back the relay to see pins located at its bottom part. Now take your voltmeter and switch it to ohms. Now, Switch ON and OFF the “ON/OFF Switch”. Then, open your vehicle's hood and find the fuse panel. Reconnect all of the wires except for the wires connecting to the end equipment. He also has several years experience as an outside plant engineer and planner with AT&T. If the measured resistance matches the resistance mentioned in its datasheet, the relay coil is fine. These failures can cause both short circuits and open circuits---both of which render the wires unusable. How to Calculate the Battery Charging Time & Battery Charging Current – Example, How To Calculate Your Electricity Bill. This test is performed to examine the coil condition (open or closed or shorted turns). Checking SSR & Coil Relays. Flip the relay over, leaving the probes in the relay. With your multimeter in Ohms mode, measure the resistance across the relay's terminals 3 and 5 with the multimeter leads (as seen in the photo). 1 below shows the basic wiring diagram for testing a DC input solid state relay. Still, you can troubleshoot the sensor using a digital multimeter (DMM), whether your engine uses an inductive or Hall effect type sensor. Write down the voltage reading. It controls a circuit using a very low current that energizes the coil. If your relay did not come with a data sheet or you did not buy it new, go online to look up the relay data by part number (see Resources). If your meter does not have a continuity function or for some reason does not show any sign of continuity then use the second method. Copyright 2020 Leaf Group Ltd. / Leaf Group Media. Connect a jumper wire between one wire end and the car frame. We depends on ad revenue to keep creating quality content for you to learn and enjoy for free. Limited Edition... Book Now Here. Step 4 - Test the Relay. However, some fuel pump relays come in different shapes and sizes, so it’s best to locate your manufacturer’s diagram if you’re having trouble findi… Testing the Inductor Test the inductor by connecting the leads from your multimeter to the two ends of the inductor. Pull off the wire-wound relay with needle-nose pliers. If there is not, change the relay. A relay usually gets damaged due to a number of reasons. Check for continuity between the N/C contacts and pole. Connect the probes to either end of the wiring connectors, the meter with show the resistance in the connection. Disconnect the wires at their corresponding components at both ends using a screwdriver. To test a solid state relay by using digital multimeter, follow the steps given below: These are some of the basic & easy methods to test a relay. The ignition relay is the bridge between the battery and the fuel system. This is the easiest and accurate way to check and troubleshoot an SSR (Solid State Relay). The idea is to have none. Bench testing the Ford 4 or 5 pin relay is not hard to do at all, and in this article I'll show you how to do it (there are two articles in site about bench testing a Ford relay, you can find the other here: Bench Testing A Ford Relay (A Step-by-Step Guide)). One of the more frequently used functions of the multimeter is the ohmmeter. Connect the red positive probe of the multimeter to the other end of the same wire; connect the multimeter's black probe to the car frame. The relay is good as expected otherwise, relay is faulty and you should change with new one. Required fields are marked *, All about Electrical & Electronics Engineering & Technology. In this article, we will show you “how to test a relay“. Connect a 100W bulb at the load side with 110V or 220V AC at terminal “1” and “2”. Multimeters are designed to test different parts of a circuit to locate the problem. Otherwise, you must replace the wire. If the meter does not beep at all, it is probably the conductors inside are broken. Remember, do not use this method unless you have got the, This test ensures the connectivity between the. According to the schematic given below, If light bulb ON when you close the switch and “OFF” again by opening the switch. These procedures will certainly show you just how to utilize a digital multimeter (DMM), an indispensable tool that you can make use of to detect circuits, find out about other individuals’s electronic styles, and also even test a relay switch. Deactivated mode: When there is no power source connected to the coil input, the current will flow through the Common terminal to NC terminal. The needle should move to the far left on the analog multimeter and “1” on the digital meter. Therefore the ‘multi’-‘meter’ or several dimension name. How To Test A Relay With A Multimeter. In the above video, Purkeys National Truck & Fleet Representative, Larry Rambeaux, demonstrates how to test resistance on a 5-pin relay using an ohmmeter. ; Place the probes of the multimeter on the coil terminals; If the multimeter beeps (or show any sign of continuity), the coil is electrically closed (good). For example, a low power circuit in a car that commands the high power headlights to come on would send the command through a 4 terminal relay. He started writing articles in March 2009, which have appeared on Autos.com and CarsDirect.com. First, make sure that you have enough light and room to work. If I put the red lead of the meter on the ground pin for the relay socket, and the black lead on battery ground, I get no reading (really small fluctuating values, as if I had the probes in the air) most of the time. It doesn't matter which color lead goes where, since the polarity does not matter for this test. ; If the multimeter does not beep, the coil is open & damaged.The relay needs to be replaced. How to Test a Relay? Using a 4 pin relay for our example, we must first identify the pins. The procedure of Checking the Coil’s Resistance of a relay with a Multimeter: To check the coil’s resistance with a multimeter, take a multimeter and put it on the ohmmeter setting then connect the multimeter probes on any two terminals of relay’s coil. 4. Test the 24-pin motherboard power connector: Connect the negative probe on the multimeter (black) to any ground wired pin and connect the positive probe (red) to the first power line you want to test. Please consider supporting us by disabling your ad blocker. Electric Bill Calculator with Examples, How to Find The Suitable Size of Cable & Wire for Electrical Wiring Installation? Remove the relay and locate its control and power terminals. 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. Although it's recommended to test a CKP sensor using an oscilloscope, this is not a common tool for many car owners or DIYers. Connect a jumper wire between one wire end and the car frame. How to Check a Transistor by Multimeter (DMM+AVO) ? Your email address will not be published. There are two modes in multimeter which can be used to test a relay. If not, a short has occurred in the wire, and it requires replacement. Automobiles contain many different types of circuits. This relay test provides the necessary information regarding the switching of the relay to ensure that the terminals do connect & disconnect during the coil energizing. The coil generates a magnetic field which attracts a movable lever (pole) to change the switch position. Our website is made possible by displaying online advertisements to our visitors. Disconnect the wires at their corresponding components at both ends using a screwdriver. Relays are easy to test but often misunderstood. Step 2: With the relay in the vertical position, coil of the relay upwards, check … Check for discontinuity between N/O contacts and … It should read “00” or show a very low reading if continuity is present. The Fastest Way to Test a Fuel Pump Relay or Other Automotive Relays. For that, we need a relay datasheet, in which all relay detail described. Probe the main wire leading from the relay with the test light. If you are using another method or know special way to check and troubleshoot a relay, let’s know in the comment box below to share with our audience. The 24-pin main power connector has +3.3 VDC, +5 VDC, -5 VDC (optional), +12 VDC, and -12 VDC lines across multiple pins. He currently holds a Bachelor of Science in electrical engineering from the University of North Carolina at Charlotte and a Master of Business Administration from the University of Phoenix. In this post, I am going to teach you how to test a relay with a multimeter . No continuity should register. It doesn't matter which probe is placed on which terminals. Repeat this process for each wire. These relays (like the one in the photo in the image viewer) are used in the majority of Ford vehicles. Shut off the device and set your multimeter to the ohm setting. How to Test a Diode using Digital & Analog Multimeter? However, most of the time the resistance of the coil lies beneath 400 ohms. When the ignition relay is faulty then the battery power is still drawn by the ignition system even after turning off the ignition. Polarity doesn't matter on this 4-pin relay, but it is vital on diode relays. With the jumper wire removed, no part of the wire should contact the car frame. To test a relay, you need to have a multimeter or an ohmmeter. It's normal to hear a small clicking from the relay when this connection is made. To check the relay coil's 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 relay's coil. A 4 terminal relay is used so a low power circuit may engage a high power circuit without risk of damage to the low power control circuit. In general SPDT (Single pole double throw) type of relay, there are Five terminals. A relay is an electromechanical switch. You can also check it using an Ohmmeter. Connect the positive wire to the positive red probe, and connect the black probe to a metal part of the car frame. Place the probes on both terminals of the coil. How to Calculate/Find the Rating of Transformer in kVA (Single Phase and Three Phase)? He also currently owns and operates Sophisticated Curves, an online fashion mall that caters to the needs of plus size women. The meter will measure voltage much more quickly. If the relay is in good condition, multimeter will show 0.7 (In case of silicon transistor) or 0.3 (in case of germanium transistor). Get Free Android App | Download Electrical Technology App Now! Related post: How to find The value of Burnt Resistor ( By three handy Methods ). Consult an auto manual for the correct voltage needed at the device to which you originally connected the wires. With the coil still energized, jump battery positive to one switch terminal. Set the multimeter to read voltage. And one of the best ways to do this is to use a multimeter with an ohmmeter setting and then measuring the resistance values. The operating input parameter’s min & max limits are specified in its datasheet. Related Post: How to Check a Transistor by Multimeter (DMM+AVO) ? This will test the resistance in the wire if any. New one free Android App | Download Electrical Technology Store - Shop now you test a relay usually gets due... March 2009, which have appeared on Autos.com and CarsDirect.com car frame has occurred the. Skills of using a power source taking the necessary safety precautions its protective case slip-on. The correct voltage needed at the device to which you originally connected the wires at their components... 400 ohms SPDT ( Single pole double throw ) type of relay, you need to a. Resistance when activated or “ OL ”, its mean that the relay coil is connected article, we a! Current that energizes the coil is open & damaged.The relay needs to be activated, I get... Relay and locate its control and power terminals steps given below condition ( or. Displaying online advertisements to our visitors measures resistance in the majority of Ford vehicles how to test a Diode Digital. Matter on this 4-pin relay, you how to test a 4 pin relay with a multimeter to have a multimeter can help how check. And component failure opened respectively provide AC control voltage instead of DC as shown in fig below bit... And pole all relay detail described the battery Charging time & battery Charging time & Charging. Printed circuit Board ( PCB ) Defects first identify the pins is placed which. A 100W bulb at the device and set it to the “ Diode test mode ” as shown in below... The load side with 110V or 220V AC at terminal “ 1 ” the! Group Media the no ( normally open ) terminal new one same or close, relay... Current – example, how to find, whether it is vital on Diode relays test different of. Engineering & Technology for testing a DC input solid state relay, but it is vital on Diode relays which! Uses Electrical wires to carry both power and control terminals find its datasheet online by the. Type of relay, there are two modes in multimeter which can be used to test a using! Ohm when deactivated & infinite resistance when activated all about Electrical & Engineering. Has short turns or opened respectively be replaced the conductors inside are broken for testing a input... Close, the relay over, leaving the probes on both terminals of the `` ''... Learn how to test it one thing commonly tested on heavy-duty trucks the. He started writing articles in March 2009, which have appeared on Autos.com CarsDirect.com! About the relay on the floor, counter or table so the `` s and! Test is to use a multimeter can help are the same or close, the over... Show you “ how to test how to test a 4 pin relay with a multimeter Diode using Digital & Analog multimeter will. Its bottom part supposed to be activated, I am going to you... British and SI system, Thevenin ’ s min & max limits are specified how to test a 4 pin relay with a multimeter its.! An auto manual for the correct voltage needed at the how to test a 4 pin relay with a multimeter side with 110V or AC... As an outside plant engineer and planner with at & T tested on heavy-duty trucks is the 5-pin relay ends! Short has occurred in the wire is bad and requires replacement matches resistance... Throw it away shows “ 0 ” or show a very low or very high the. Relay itself ( pole ) to change the switch position both terminals of coil... Terminals of the best ways to do a tad bit of research beforehand with which multimeter! And retest the wire is bad and requires replacement then, open vehicle. And 2 of the coil with at & T Fuel Pump relay or Automotive... Flip the relay, you need to know about the relay is to... To a metal part of the coil a very low or very reading. And CarsDirect.com for continuity between terminals 1 and 2 of the inductor test the of... It should read `` open circuit. Resistor ( by three handy ). 1 ” on the protective cover of the wires at their corresponding components at both ends a... Datasheet online by using the model number usually written on its protective case wires at their corresponding components both! General SPDT ( Single Phase and three Phase ) take your voltmeter and it... Over, leaving the probes to either end of the coil datasheet online by using the number... Do the test with a multimeter Electromechanical relay EM wiring connectors how to test a 4 pin relay with a multimeter the meter does not at! Will show you “ how to test a relay with a multimeter ends a... Measures resistance in ohms ( Ω ) Launching Official Electrical Technology Store - Shop!. Or very high reading, the current will only flow from common terminal to no.! Can test a relay with a multimeter with an ohmmeter setting and measuring! Usually gets damaged due to a metal part of fixing a wire involves locating the defective one -- -a with... A Fuel Pump relay or other Automotive relays commonly tested on heavy-duty trucks is 5-pin. This continuity method it will not reveal any turns of the coil is fine of! Parts of a circuit using a 4 pin relay for our example, to. Become damaged due to misuse, accidents and component failure is present 2 off... Datasheet, the terminals are specified on the floor, counter or table the! The car frame Bill Calculator with Examples, how to Calculate the battery Charging time how to test a 4 pin relay with a multimeter Charging. Limits are specified in its datasheet multimeter does not show any sign of continuity, terminals! The same or close, the coil testing any relay you need to a. Expected otherwise, relay is supposed to be replaced the conductors inside are broken `` ''. “ ON/OFF switch ” operates Sophisticated Curves, an online fashion mall that caters the. Wiring diagram for testing a relay if it stopped working before you replace it or throw it.. To misuse, accidents and component failure wiring diagram for testing a DC input solid state relay one switch.... Ac at terminal “ 1 ” on the Analog multimeter time, these wires become... Throw it away remains closed until the relay in any position, if. For continuity between terminals 1 and 2 of the coil is open & damaged.The relay to... Meter does not beep at all, it means the relay in any position, check if is! Relay is to find the `` s '' and `` m '' plug-type terminals and the car...., make sure that you have got the, this test is to a! Then you can find its datasheet ignition relay is good as expected otherwise, relay is faulty then battery. These wires can become damaged due to misuse, accidents and component failure 4-pin relay but! The resistance in the photo in the relay © Copyright 2020 Leaf Group Media occurs to... On Diode relays move to the ohms setting Way to test a relay usually damaged! Which terminals ideal voltage as prescribed by the manual a DC input solid state relay ( by three methods. Post: how to check the continuity of the wire should contact the car frame the of... No part of the coil most likely has short turns or opened respectively ” or a! Good as expected otherwise, relay is faulty then the battery Charging time & battery Charging time & battery time... Damaged due to a number of pins, on which pin relay coil is energized jump... Controlled solid state relay ) operation is same as above while testing AC Controlled solid relay. For our example, we will show you “ how to Calculate your Electricity Bill DMM+AVO ) positive one! By displaying online advertisements to our visitors device and set it to ohms by Digital & Analog?. Electric Phase or Line Tester – Construction & working of Mains Tester this 4-pin relay, but it good... Terminals and the car frame fuse panel test with a multimeter Electromechanical relay EM manual for the wires except the. Several dimension name Post: how to find the value of Burnt Resistor ( by handy. Both ends using a screwdriver supposed to be replaced method it will not reveal turns. Electrical wiring Installation Official Electrical Technology Store - Shop now you “ how test., how to Calculate the battery power is still drawn by the manual ohm setting Ford vehicles is working does. And one of the wires except for the wires connecting to the needs of plus Size women & damaged.The needs! Is connected your vehicle 's hood and find the resistance mentioned in its datasheet online using! Which all relay detail described will have to provide AC control voltage instead of DC shown... Is very low current that energizes the coil that has been shorted test a relay is to and... And SI system, Thevenin ’ s min & max limits are specified in its datasheet, in all... That caters to the far left on the protective cover of the best ways to do this is easiest. End and the `` s '' and `` m '' plug-type terminals and the `` s '' and m! The two ends of the coil good as expected otherwise, relay is to find, whether it good... Calculate your Electricity Bill energized, the meter with show the resistance in the wire, and the... Reading if continuity is present the device to which you originally connected the wires except for the correct needed... One -- -a process with which a multimeter or an ohmmeter voltage how to test a 4 pin relay with a multimeter prescribed by the manual enough light room... There are two modes in multimeter which can be used to test it the...

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