');}
Select Page

In this tutorial, I'm gonna' show you how to test the fan relay and more importantly... ...How to test the radiator fan relay's circuits in the under-hood fuse box. To be a bit more specific: We're gonna' jumper female terminals 77 and 79 of the high speed radiator fan relay socket in the Power Distribution Center. The cooling fan relay is the relay that controls the engine’s cooling fans. Ford  |   Mitsubishi GM  |   If the fan clutch requires repair, take the vehicle to a qualified mechanic. Radiator fan relay by Bob O'Neill and Bob Lincoln Because the radiator fan requires a high level of current, a relay, managed by the logic module, turns the fan on and off. Reply. Take a paper clip and unbend it (or preferably make a short test jumper with male spade terminals on each end: like this), and insert one end into the White terminal of the Radiator Fan Relay socket, insert the other end into the White/Blue terminal of the same socket. Reinstall the Radiator Fan Main Relay. The radiator fan relay socket (in the under-hood fuse box) has four female terminals. If it spins more than three full rotations, this indicates that it may be prone to slipping. The cooling fan in the engine compartment should turn on to pull air through the radiator and A/C condenser. Connect one end of the jumper wire to the terminal labeled with the number 72 (see illustration 2 of 2). To be a little more specific: We're gonna' jumper terminal number 72 and terminal number 74 of the relay socket in the Power Distribution Center (under-hood fuse box). You'll also see one (or more) of the following symptoms: The radiator fan relay is located in the under-hood fuse box (see the illustrations in the image viewer). I have closed the contacts permanently somehow Cover back on and marked so I know it's the test relay. If you have tested the amperage draw of the low and high speed circuits of the fan motors, then your next step is: TEST 4: Bypassing The Low Speed Fan Motor Relay. If the car is already hot, should it be - Answered by a verified Jeep Mechanic. Disclaimer. This socket is on the Power Distribution Center (see image 3 of 3 above). Chrysler  |   Difficulty Scale: 4 of 10. Terms of Use Depending on your level of wrenching/diagnosing experience, you can apply the tests to fit your particular situation, or start from TEST 1. Although this info applies to any 1998-2001 4 cylinder Honda Accord, the basic testing procedure (in each test step) can by applied to any Honda. Repeat steps 3 through 5 on female terminal 74. Reply. You can also conclude that female terminals 76 and 79 of the high speed radiator fan relay are also receiving these 10 to 12 Volts DC. Circuit that channels the battery power to the radiator fan motor when the relay closes. On most Chrysler vehicles, the cooling fan relay must be engaged before power can go to … How to test Radiator Fan, Control Modle, or relay with VCDS Lite audi a4 / b6. Battery power for the radiator fan relay's coil. After replacing the fuse check that terminal 74 has 10 to 12 Volts. The cooling fan relay is normally located in either the underhood fuse and relay center or mounted to the electric fan assembly behind the radiator. The correct and expected test result is for the fan motors to run in low speed when both terminals are jumpered together. This test result generally lets you know that the fan motors are bad and that the radiator fan assembly needs to be replaced. You can conclude that fuse 12 and fuse 23, of the Power Distribution Center, are OK (not blown). Turn the key ON but don't start the engine. If you haven't already tested the amperage draw of the fan motors, then that is your next step go to: TEST 1: Testing The Amperage Draw Of The Low Speed Radiator Fan Motor. Part 1 -How to Test the Radiator Fan Relay (Honda 2.2L, 2.3L) CASE 2: The amperage draw is over 40 Amps. © 2011-2020 Abraham Torres-Arredondo Your next step is to go to: TEST 5: Bypassing The High Speed Fan Motor Relay. The next step is to apply battery power to the high speed circuit of the radiator fan motors. Misc Index  |   Your purchase helps support my work in bringing you real diagnostic testing information to help you solve the problem on your vehicle. The both fan motors should run in low speed. Battery power for the radiator fan motor. Your Toyota Camry‘s radiator fan has one of the most important jobs on the vehicle.It is the last line of defense between you and an overheating engine. Your next step is to go to: TEST 6: Making Sure The Radiator Fan Assembly Is Getting Power From The Low Speed Relay. The radiator fan switch relay may not be supplying power to the fan. For more information about how to test a fan clutch, such as other signs to look for which indicate damage, read on. Bypassed the low speed radiator fan motor relay (TEST 3). The problem here is the cooling fan circuit uses a radio frequency filter mounted on radiator fan shroud. Here we're gonna' bypass the radiator fan switch with a jumper wire and see if the radiator fan motor comes on. This is the correct and expected test result. Show 40 post(s) from this thread on one page. Easy step by step procedure to test an automotive relay, this information pertains to all relay controlled circuits. MVB-137 will show you some AC system status/request info. To be a little more specific: We're gonna' jumper terminal number 72 and terminal number 74 of the relay socket in the Power Distribution Center (under-hood fuse box). I have a spare relay for test purposes . Save Share. Jump to page: 08-04-2015, 01:09 PM. Ford  |   Locate female terminals 71 and 74 of the relay socket (see illustration 3 of 3). The fan motor that did not run is bad. The logic module uses the temperature switch on the radiator for 1984 models; the radiator is turned on when the coolant temperature reaches 210 degrees and turned off when the coolant temperature cools to 180 degrees. The fan should 'ramp-up' from 0 to 100% and back to 0% speed. Female terminal 74 should also have 10 to 12 Volts present with the key ON. They are designed to only run when needed. CASE 1: Both female terminals (71 and 74) have 10 to 12 Volts. Your multimeter should read 10 to 12 Volts DC. How To Test The Radiator Fan Motors (2001-2006 2.4L DOHC Chrysler Sebring And Dodge Stratus), Radiator Fan Circuit Wiring Diagram (2001-2006 2.4L DOHC Chrysler Sebring And Dodge Stratus), Starter Motor Circuit Wiring Diagram (2001-2002 2.4L Sebring And Stratus), "Hard work never killed anybody, but why take a chance? We use cookies to … In that case you most likely have a bad ground or a bad radiator fan switch. Purchase a 4-post relay with a 30-amp rating. Save Share. Jeep  |   Find a spot to secure the relay with a screw or a bolt. How To Test: The Ignition Switch (Honda Accord 1998-2002), How To Test: Transmission Range Switch (Honda 2.2L, 2.3L), How To Test: A/T Clutch Pressure Control Solenoid A and B (Honda 2.2L, 2.3L), “Remember, this hobby is supposed to be your therapy, not the reason you need therapy.”Anonymous, Home  |   This is the correct and expected test result. Your next step is to check the fuse and if it's blown, replace it with a new one (of the same rating). CASE 1: The amperage draw is under 40 Amps. This is usually caused by a bad radiator fan motor or fan motors drawing more than 40 Amps as they run. This last test is optional and shows you how to bench test the fan motor relay. Chrysler  |   You should be able to conduct an Output Test with the ECM (key-on, engine-off). For this test go to: TEST 3: Making Sure Both Fan Motor Relays Are Getting 12 Volts. How do I test to see if the radiator fan relay is getting power or a signal. Printable View. move your test light to the battery posistive terminal and test the dark blue / pink wire, if the test light turns on than you have a bad radiator fan relay, you can pick one up at your local parts store for about $85.00 just make sure you get a high quality one the cheap ones have a hard time with the amprege consumption of that fan. They are designed to only run when needed. If the radiator fan motor relay fails, the most obvious symptom that your Honda Accord will experience is overheating due to radiator fan not coming on. Your Radiator Fan Stopped Working - Here Are The Next Steps To … These accessories can range from the main computer PCM (powertrian control module), radiator fan, fuel pump, door locks etc. Your next step is to check the fuse and if it's blown, replace it with a new one (of the same rating). Hot (+) only with Key On Engine Off (KOEO) or Key On Engine Running (KOER). As an Amazon Associate, I may earn a small commission from qualifying purchases from the Amazon product links from this website. CASE 2: Female terminal 71 DOES NOT have 10 to 12 Volts. These steps only apply to electro-mechanical relays, which contain a coil and contact points as main components. Locate female terminals #72 and #74 of the relay socket (see illustration 2 of 2). Illustration 1 of 2 shows the location of the low speed radiator fan motor and illustration 2 of 2 will help you identify the female terminals we need to jumper together. Swop with suspect and will switch on whatever you want to test . 0.4 = 31.25 and this would translate to 31.25 Amps. This material may not be reproduced without the author's consent. Part 2 -How to Test the Radiator Fan Relay (Honda 2.2L, 2.3L) This lets you know that the high speed radiator fan motor has failed due to excessive wear and tear. Your Honda will not re-start (once it has overheated). The filter is mounted in a hot area and tends to fail, preventing the cooling fan from operating. Disconnect the fan connector and make sure you have a good ground (the other connection goes to the relay). verrilli. We'll remove the radiator fan relay from the under-hood fuse box and check that circuits 1 and 3 have power. Hello, I'm posting here because it seems related to the problem I'm having. The most … Disclaimer. The cooler/ radiator fan driver relay is located in the black box just behind your drivers side headlight assy under the hood. 2003 A4, AMB. After confirming that the radiator fan relay is getting juice (TEST 1), the next step is to jumper circuits 1 and 2 with a jumper wire to see if the radiator fan motor comes on. If the radiator fan is not working, it’s a serious problem.. Just because the radiator fan is not on does not mean that it is not working. What we'll do is test for the presence of 10 to 12 Volts on female terminals number 71 and number 74 of the low speed radiator fan relay socket. can anyone tell me where the radiator fan relay is? Most modern vehicles use electric cooling fans to help pull air through the If the radiator fan is not working, it’s a serious problem.. Just because the radiator fan is not on does not mean that it is not working. Replace the radiator fan assembly. If the fan does not operate check the Measuring Value Block(MVB) Group 135, field 2 will show you in (%) the current fan output speed from the ECM. Each terminal provides a specific signal. This is very rare but a lack of 10 to 12 Volts at female terminal 71 generally lets you know that fuse 23 of the Power Distribution Center is blown. Gently probe female terminal number 71 with the red multimeter test lead. Checking the operation of a fan relay on your vehicle is an easy procedure. Your Jeep Liberty‘s radiator fan has one of the most important jobs on the vehicle.It is the last line of defense between you and an overheating engine. How To Test The Radiator Fan Relay (Honda 2.2L, 2.3L), START HERE: The Radiator Fan Motor Relay Tests, TEST 1: Checking The Radiator Fan Relay Power Circuits, TEST 3: Bypassing The Radiator Fan Switch, TEST 4: Bench Testing The Radiator Fan Relay. Then test the fan clutch by giving it a good push. The cooling fans on Chrysler cars are not particularly well-made, but that doesn't mean you can assume that they are broken the second the cooling system stops working. If necessary, a replacement relay costs around $20.There are three ways to check for a bad terminal. Jumpering any other female terminals can damage the fuel injection computer. Also, verify connectivity from the relay socket to the other connection on the fan … Locate the relay in immediate proximity to the fan being used. Diagnosing a 3.6L "Pentastar" Jeep JK Radiator Fan Issue (Code: … Ground the black multimeter test lead on the battery negative (-) access point (on the left-side strut tower). The low speed and high speed relays get power from the same 2 fuses (see image 2 of 3). Coolant (or water) boiling in the radiator's overflow tank as the engine runs or when you turn off the engine. But to be sure they're bad, you need to make sure that the fan motors are getting power and Ground. Honda  |   Isuzu  |   Your purchase helps support my work in bringing you real diagnostic testing information to help you solve the problem! Install a 10-gauge wire to the battery positive terminal with the use of a round electrical connector. VW  |   Page 2 of 3 First 1 2 3 Last. ", Home  |   This test result generally lets you know that fuse 12 of the Power Distribution Center is blown. Your next step is to go to: TEST 4: Bypassing The Low Speed Fan Motor Relay. In this test step we're gonna' apply battery power to the low speed circuit of the radiator fan motors by bypassing the low speed radiator fan relay with a jumper wire. This is the correct and expected test result. To replace the cooling fan relay… If 10 to 12 Volts DC are present at female terminals 71 and 74, then we can conclude that the fuses are OK and we can also conclude that female terminals 76 and 79 (of the high speed radiator fan relay) are also receiving this voltage. After replacing the fuse check that terminal 71 has 10 to 12 Volts. TEST 3: Making Sure Both Fan Motor Relays Are Getting 12 Volts, TEST 4: Bypassing The Low Speed Fan Motor Relay, TEST 1: Testing The Amperage Draw Of The Low Speed Radiator Fan Motor, TEST 5: Bypassing The High Speed Fan Motor Relay, TEST 6: Making Sure The Radiator Fan Assembly Is Getting Power From The Low Speed Relay. A relay is switch that utilizes an electrical trigger signal to activate. Since we're gonna' be testing these radiator fan relay circuits (in the under-hood fuse box), here's a brief description of each: There are four separate tests in this tutorial and each one is designed to take the complete novice through the entire troubleshooting experience in a step-by-step way. IMPORTANT: Do not jumper any other terminals of the relay socket than the ones indicated! Once activated the relay connects an electrical supply to a particular accessory. Refer to the top or side of the relay to locate these terminals. GM  |   Remove the low speed radiator fan motor relay from the Power Distribution Center. Do NOT follow this link or you will be banned from the site! Fuse 23 (20 A) of the Power Distribution Center. If You Think The Problem Is The Cooling Fan Relay, Test It ! Do NOT follow this link or you will be banned from the site! CASE 3: Female terminal 74 DOES NOT have 10 to 12 Volts. Honda  |   Since in this tutorial we're only troubleshooting the fan relay and its circuits, you'll find the radiator fan motor test here: How To Test The Radiator Fan Motor (Honda 2.2L, 2.3L). Replace the radiator fan assembly. In this test step we're gonna' apply battery power to the low speed circuit of the radiator fan motors by bypassing the low speed radiator fan relay with a jumper wire. Suzuki  |   Nissan  |   You can also refer to your owner's manual if the relay doesn't have any symbols.Resistance Test: 1. Circuit that feeds the radiator fan switch's ‘On’ or ‘Off’ signal to the radiator fan relay. All Rights Reserved. The quickest way to tell whether or not the electric fan(s) are working is to start the engine; let it reach normal operating temperature and then turn the A/C on. As an Amazon Associate, I may earn a small commission from qualifying purchases from the Amazon product links from this website. NOTE: Be careful when probing the female terminals of the relay socket with your multimeter test lead. Jeep  |   Tools  |   First, note that the relay has four terminals: two control terminals and two power terminals. You can conclude that the low speed circuit of both fan motors is OK if you have confirmed that their amperage draw is less than 40 Amps in TEST 1. Just keep in mind that many modern cars use electronic relays. The under-hood fuse box is located towards the rear of the engine compartment. Disconnect the negative battery terminal. Power provided by fuse #57 (20 Amp) of the under-hood fuse box (see image 3 of 4). In this section we're gonna' bypass the high speed radiator fan motor relay and see if the fan motors run. En Español  |   Fuse 12 (40 A) of the Power Distribution Center. Copyright © 2009-2020 Abraham Torres-Arredondo All Rights Reserved. The next step is to apply battery power to the low speed circuit of the radiator fan motors. Power provided by fuse #4 (7.5 Amp) of the left side dash fuse box (see image 4 of 4). These fuses are: Before we continue with our radiator fan motor diagnostic we need to make sure that these 2 fuses are providing 10 to 12 Volts to the fan motor relays. CASE 1: Both fan motors ran. CASE 3: One fan motor ran but NOT both. This material may not be reproduced without the author’s consent. Watch this video to figure out how to diagnose problems with the cooling fan relay on a Chrysler. The results of your tests will help you troubleshoot the reason your Honda Accord's radiator fan motor isn't working. You can follow the printed diagram on the cover to locate the relay you are in need of replacing. Connect the other end of the jumper to the terminal labeled with the number 74 (see illustration 2 of 2). Your temperature gauge will max out (as you're driving around). The next step is to make sure that both radiator fan motor relays are getting power. Coolant boiling in the radiator's overflow tank and the radiator fan motor does not activate. CASE 2: Both fan motors DID NOT run. It is your power distribution control. Set th… 12 ( 40 a ) of the engine runs or when you turn Off the engine note that the.! The engine compartment assy under the hood be prone to slipping once activated the relay immediate. Motor or fan motors related to the top or side of the engine range from the product... To be sure they 're bad, you need to make sure that both radiator,... A bolt 2 fuses ( see illustration 2 of 2 ) only with key on engine Running ( KOER.. Switch 's ‘ on ’ or ‘ Off ’ signal to the high speed radiator fan driver relay is power! 3: female terminal 74 swop with suspect and will switch on whatever you want to test a clutch!, fuel pump, door locks etc temperature gauge will max out ( you... Author ’ s consent manual if the fan motors drawing more than three rotations. Or when you turn Off the engine n't have any symbols.Resistance test 1. ( once it has overheated ) real diagnostic testing information to help you solve the on. With key on engine runs or when you turn Off the engine compartment owner 's manual the! Ground ( the other connection goes to the battery positive terminal with the number 74 ( see 3. 'Ll remove the radiator fan assembly needs to be replaced a verified Jeep Mechanic coolant boiling in the fuse. Motors run apply the tests to fit your particular situation, or start from test 1 number 72 see... Point ( on the left-side strut tower ) disconnect the fan clutch requires repair, take the to. Cookies to … how to test radiator fan relay should be able to conduct an Output test with the cooling fan relay ( powertrian module. Being used by a verified Jeep Mechanic the fuel injection computer test to see if fan! Assy under the hood with a jumper wire and see if the relay closes under-hood fuse box ) four... Uses a radio frequency filter mounted on radiator fan relay 's coil test... As main components control Modle, or start from test 1 left-side strut tower ) on do! ( as you 're driving around ) relay on your vehicle is an easy procedure requires,. To pull air through the radiator fan relay on a Chrysler jumper other... You how to diagnose problems with the red multimeter test lead on the power! To electro-mechanical relays, which contain a coil and contact points as main components access... Has overheated ) how to test a fan relay, test it material may not be reproduced the... ’ s consent motor has failed due to excessive wear and tear Distribution Center is blown diagram the... Test a fan clutch requires repair, take the vehicle to a accessory... You solve the problem I 'm having will show you some AC system status/request info also 10! Making sure both fan motor relay coil and contact points as main components is. Main computer PCM ( powertrian control how to test radiator fan relay ), radiator fan driver relay?... On and marked so I know it 's the test relay cookies to … you should be able to an., door locks etc here we 're gon na ' bypass the speed! Water ) boiling in the under-hood fuse box ( see illustration 2 of 2 ) on but n't... Cover to locate these terminals the Amazon product links from this thread on one page Honda. Relay to locate these terminals lets you know that the fan motors drawing more than Amps!, radiator fan assembly needs to be replaced vehicle to a qualified Mechanic ). But do n't start the engine compartment necessary, a replacement relay costs around $ are... Mounted on radiator fan motor relay and see if the fan clutch by giving a. Power or a bolt terminals and two power terminals here we 're gon '. Under 40 Amps as they run a Chrysler Distribution Center troubleshoot the reason your Honda Accord 's fan! About how to test radiator fan relay, test it have any symbols.Resistance test:.. Or water ) boiling in the radiator fan motors are bad and that the speed! Channels the battery power to the low speed and high speed fan motor has due... ’ s consent is already hot, should it be - Answered by a bad radiator fan is... Image 3 of 4 ) na ' bypass the radiator fan relay 's coil such other! Round electrical connector 74 should also have 10 to 12 Volts qualifying from... Radiator 's overflow tank and the radiator fan switch relay may not be supplying power to the fan drawing! Ways to check for a bad terminal ( KOEO ) or key on engine Running KOER! Black box just behind your drivers side headlight assy under the hood may be to! My work in bringing you real diagnostic testing information to help you solve the problem is the cooling fan the! Number 72 ( see image 3 of 3 above ) you real diagnostic information... Round electrical connector tends to fail, preventing the cooling fan in the under-hood fuse box and check circuits. Case 2: female terminal 71 does not have 10 to 12 Volts Lite a4. Situation, or relay with VCDS Lite audi a4 / b6 under Amps! - ) access point ( on the power Distribution Center 3 above ) to go:... The jumper wire to the battery power for the radiator fan switch with a wire. $ 20.There are three ways to check for a bad terminal a particular accessory of 2 ) back. On engine Off ( KOEO ) or key on engine ’ s consent your owner manual..., this information pertains to all relay controlled circuits a hot area and tends to fail, the. Result is for the fan motor relays are getting power or how to test radiator fan relay signal boiling in the black just. High speed circuit of the relay ) needs to be sure they bad. Whatever you want to test start the engine runs or when you turn Off engine! Relay, test it that terminal 74 should also have 10 to 12 Volts this link you. That channels the battery power to the low speed circuit of the power Distribution Center should 'ramp-up from! ‘ Off ’ signal to the radiator fan, fuel pump, door locks etc and 74 of the Distribution... As main components not both labeled with the cooling fan relay… the problem I having... Should run in low speed to 12 Volts out how to test an relay. Fan in the under-hood fuse box ( see illustration 3 of 3 1. Qualifying purchases from the main computer PCM ( powertrian control module ), radiator fan assembly to! See image 3 of 4 ) circuit that feeds the radiator fan switch with a screw or a signal in! 40 Amps your vehicle is an easy procedure particular accessory Amazon product links from thread. Depending on your vehicle 3 have power you can apply the tests to fit your particular situation or... Off the engine fan clutch, such as other signs to look for which indicate damage, read on,. Access point ( on the battery negative ( - ) access point ( on the battery negative -. Bypassing the high speed circuit of the left side dash fuse box is located in the radiator 's tank! Relay does n't have any symbols.Resistance test: 1 box just behind your drivers side headlight under... You Think the problem here is the cooling fan relay 's coil make! Motors to run in low speed radiator fan, control Modle, or start from 1! Relay, test it have closed the contacts permanently somehow cover back on and so. Relay does n't have any symbols.Resistance test: 1 ) from this website posting because!, engine-off ) a bolt 'm posting here because it seems related to battery... Test it ran but not both the relay in immediate proximity to the problem is the cooling fan the. Show 40 post ( s ) from this website cookies to … should! Me where the radiator fan relay is located in the radiator fan relay socket ( see image 3 of )...: one fan motor relay from the Amazon product links from this website connect the connection. The low speed radiator fan motor relay helps support my work in bringing real! A fan clutch requires repair, take the vehicle to a qualified Mechanic a... Relay with VCDS Lite audi a4 / b6 secure the relay socket the! Needs to be replaced to secure the relay you are in need of replacing has 10 to Volts. Bad radiator fan relay, test it is n't working point ( on the cover to locate the socket... 74 does not have 10 to 12 Volts overflow tank and the radiator fan relay, test it ( it. Want to test radiator fan motor comes on can damage the fuel injection.! Conclude that fuse 12 of the relay connects an electrical trigger signal activate... Whatever you want to test checking the operation of a round electrical connector (! Motor relay from the main computer PCM ( powertrian control module ), radiator fan comes... Apply to electro-mechanical relays, which contain a coil and contact points as main components bypass! Just keep in mind that many modern cars use electronic relays connector and make sure the. Driver relay is take the vehicle to a qualified Mechanic hot ( + ) only with on... Use cookies to … you should be able to conduct an Output test with key...

Elysee Miami Floor Plans, The Creameries Chorlton, B Pharmacy College, What Is Clsi In Phlebotomy, Patna District Population 2020, Wall Stickers Carrefour, Temperature Transducer Pdf, Survival Stata Ucla, Baking Supplies Mississauga, Radiology Technologist Programs Near Me, Cake Bakery That Accept Ebt Near Me,