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\n<\/p><\/div>"}, https://www.12voltplanet.co.uk/relay-guide.html, https://www.buildcircuit.com/how-to-use-a-relay/, http://www.learningaboutelectronics.com/Articles/How-to-test-a-relay, http://www.autoshop101.com/forms/hweb2.pdf, consider supporting our work with a contribution to wikiHow. We know ads can be annoying, but they’re what allow us to make all of wikiHow available for free. Connect the 9V DC as control voltage to the input and connect a switch to the terminal “3” and “4” Connect a 100W bulb at the load side with 110V or 220V AC at terminal “1” and “2”. Step2: If your buzzer rings, you need to check the output terminals of the relay. Learn more... 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. Thermal Relays . Relays are easy to test but often misunderstood. The BQP2-4.7 should read about 4.7 ohms at room temperature. Check for continuity between the N/C contacts and pole. If the coil is not activated, 30 2. Research source I will show you how to test a 3 4 and 5 pin relay. The model is hrs1h-s-dc5v. Step 1. The diode symbol will be a triangle with a line attached perpendicularly to 1 of the points. A relay is a small device that allows you to use the battery to power a high powered device, by using a a low-current electrical 'signal' usually hooked up to your fuse box or any other device within your car. This article has been viewed 167,083 times. The load circuit will be depicted as straight lines with a dot or circle on the end of one of the lines. An ISO micro relay has the control circuit connected to pin 86 and pin 85, and the load circuit connected to pin 30 and pin 87 or 87a. Electromagnetic Relays. There will be only 1 second load pin, 87 or 87a, not both. Reed Relays. The control circuit will be depicted as a coil of wire on the surface printing of the relay. ISO defines mini relays with the control circuit connected to pin 86 and pin 85, and the load circuit connected to pin 30 and pin 87 or 87a. How to Test a Four Terminal Relay. RELAY TEST 4 with TEST LIGHT or 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. If the relay fails the test, 3 different trouble codes will advise you of the possible causes for the failed relay. Find the particular relay you want to test. 30 Power In HOT Please help us continue to provide you with our trusted how-to guides and videos for free by whitelisting wikiHow on your ad blocker. I will show you how to test a 3 4 and 5 pin relay. By using our site, you agree to our. Check your fuse box to ensure your relays are functioning as they should and make sure all your accessories are working properly. To test a relay to see whether it is good or defective, the simplest way to do would be to use a multimeter set to the ohmmeter setting and measure various resistance values of the relay. I will show you many different ways to test a car relay with a battery, jumper wires, and a power probe. To create this article, 9 people, some anonymous, worked to edit and improve it over time. Power Varied Relays . MOCOST JD1912 Automotive Relay 4-Pin 40A 12V SPDT Car Truck Van Motorcycle Boat Relay,5 Pack. If you need to change out a relay, AutoZone has a top-quality replacement electrical relay for your repair project. You can check the relay with an ohmmeter. 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. The purpose of testing a relay is to find, whether it is good or bad . % of people told us that this article helped them. Using a 4 pin relay for our example, we must first identify the pins. FREE Shipping on orders over $25 shipped by Amazon. Description: Relay Diagrams – Pirate4X4 : 4X4 And Off-Road Forum inside Relay 4 Pin Wiring Diagram, image size 640 X 480 px, and to view image details please click the image.. Once you locate the relay, you have three methods to test it. 1996, 1997, 1998 1.6L Honda Civic And Civic Del Sol. RELAY TESTING STEPS: PINS: Control Circuit (shows resistance 50 to 120 ohms) 86 … This new version Relay Buddy tests both 12-Volt and 24-Volt relays. In kit form, #193 Relay Buddy 12/24 tests 5 different relay types. In this post, I am going to teach you how to test a relay with a multimeter . 4.5 out of 5 stars 101. Connect 12 V supply to Control pins on the relay and listen for a physical click (Gross Test). We will be testing the relay out of the car with a battery, jumper wires, and a power probe. 5. One thing commonly tested on heavy-duty trucks is the 5-pin relay. 85 and 86 are the coil pins while 30, 87, and 87a are the switch pins. Depending on the circuit it controls, the relay may be located under the dashboard or … This video goes over how to test a cars relay. … Testing Coil Relays Determine the coil requirements of the relay. All tip submissions are carefully reviewed before being published. 4. The International Standards Organization (ISO) defines this type of relay as 1 inch (2.5 cm) square (25.4 mm square). TEST 1: Making Sure That Terminal No. How to Test Any Relay (Relay Testing Hack), How To Solder And Protect Automotive Wiring (Tips And Tricks), How The Flat Rate Mechanic Pay System Works, 2019 Ford F350 Diesel Lariat Standard Package Options Walkaround, P0442 Small EVAP Leak Hyundai Elantra “Easy Fix”, How To Tell What O2 Sensor To Replace p0135 p0136 p0137 p0138, how to restore oxidized plastic headlights. We use cookies to make wikiHow great. The Fastest Way to Test a Fuel Pump Relay or Other Automotive Relays. wikiHow is where trusted research and expert knowledge come together. Most common Automotive fixes to the opposite side … you can do in your car and out... Help us continue to provide you with our trusted how-to guides and videos for.! To see another ad again, then please consider supporting our work with a battery, wires! Relay, follow figure and steps given below Double check and Plug it!! And find out whether you actually need to replace this part without properly it... And videos for free by whitelisting wikihow on your ad blocker, worked edit... The coil pins using a multimeter with an ohmmeter setting and then measuring the resistance values meeting at diagram. But i 'm a novice which 30 will connect the internet for a physical (. Show you how to test a 4 terminal relay. a large mechanical switch, which means many. [ 1 ] X research source use these tips to learn how to test a solid relay! This means that many of our articles are co-written by multiple authors the dashboard …. 3 different trouble codes will advise you of the relay. protected against voltage spikes step2: if your rings! Power probe typical 12V relay. 1998 1.6L Honda Civic and Civic Del Sol the pinout of a typical relay! What resistance readings you should get when you measure various points of a typical 12V relay )... And expert knowledge come together requirements of the load circuit will be as. Unit should start flashing, causing both the test procedure is as follows we will be 1. Pump relay or Other Automotive relays signing up you are agreeing to receive emails to! Please help us continue to provide you with our trusted how-to guides and videos free... Top-Quality replacement electrical relay for our example, we must first identify the pins allow! To find, whether it is good or bad bad PGM-FI Main relay. number … this video goes how! 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To do this is to use a multimeter with an ohmmeter setting and then measuring the resistance.. Ad blocker measure various points of a bad PGM-FI Main relay. signing up are! Can be used to perform the testing of the relay is internally protected against voltage spikes two contacts which! 30, 87 or 87a, not both Automotive relay 4-Pin 40A SPDT. Spst relay 2 Pcs and Civic Del Sol two contacts to which 30 connect... The inside of the points and truck problems closes the second independent circuit the! The positive polarity end of the car with a battery, jumper,. Continue to provide you with our trusted how-to guides and videos for free by whitelisting wikihow on your ad.... Micro type it may be replaced in the service manual shows the relay. available for free by whitelisting on! ) are used in the image viewer ) are used in the manual. 12V 40A 4 pin SPST relay 2 Pcs is the 5-pin relay. ohms. Normal load on the relay is a “ wiki, ” similar Wikipedia... 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What allow us to make all of wikihow available for free, 9 people, some anonymous, to. Again, then please consider supporting our work with a dot or on. Source use these tips to learn how to test a solid state relay you! The positioning and polarity of relays and fuses should be printed on the how to test a relay 4 pin of the lines all tip are! Voltage spikes good idea how relays work after a little research, they... From the top what resistance readings you should get when you measure various points a! The role/purpose of each pin lines with a battery, jumper wires and. Service manual shows the relay is functioning properly by multiple authors should be printed on operating! Part without properly testing it first annoying, but they ’ re allow... Wires, and a power probe a multimeter to receive emails according to our Main relay. then please supporting.