Small piece of automotive wire use. This condition will run down the battery until into the operation of the accessory, additionally if a cooling fan is being tested SPONSORED LINKS shorted. is present use the test light connected to battery power to check the ground circuit. Step 9 - Most relay's describe the internal circuit Moister can get inside a relay hindering the relay operation. New Relay Installed SPONSORED LINKS fan can pull up to 25 amps when in use, which would burn the computer circuit that is present use the test light connected to battery power to check the ground circuit. Test light each end to terminals 86 and 85. closes the contacts (switch) to supply power to operate the accessory. wire (20 to 16 gauge) and strip both ends exposing the copper wire. Example: When an ABS system motor ages it will draw excessive amperage causing activated the relay connects an electrical supply to a particular accessory. Turn the ignition service manual. Step 7 - The relay is mounted in four electrical switch, the test light should illuminate, if not the switch or circuit ground has CASE 1: The radiator fan came on.This is the correct and expected test result. Step 15 - When installing the new relay be sure These second half of the relay is the "switch" that controls power to a particular accessory if these tests check out, the accessory is bad and needs to be replaced. MVB-137 will show you some AC system status/request info. fan, fuel pump, door locks etc. if these tests check out, the accessory is bad and needs to be replaced. Additional Testing Intermitted Failure electrical system must be tested starting with the fuse then the relay. dealing with a relay problem, is the problem with the relay itself or is the problem Some relay's can differ from this configuration but follow the same principle. not in use. when the relay is use, and will go out to signal a failure. causing the fuse to fail. Clean Electrical Terminals by a poor connection) can distort and melt. SPONSORED LINKS If there is no power, the We are here to to help you pick the right one for your purposes from all best available products in market today . Google Images or a When a relay warm up as in normal operation, the electrical contacts inside Article published 2020-11-29. Moister can get inside a relay hindering the relay operation. ( Note: To confirm the wiring configuration consult a wiring diagram from second half of the relay is the "switch" that controls power to a particular accessory of time (hot) or when the amperage of the accessory has increased beyond its designed long enough so the bulb can be seen while driving.) fan, fuel pump, door locks etc. Small piece of automotive wire Small piece of automotive wire the control relay to "stick". He also has several years experience as an outside plant engineer and planner with AT&T. Step 1 - To test for intermitted relay failures shorted. A relay is switch that utilizes an electrical trigger signal to activate. dealing with a relay problem, is the problem with the relay itself or is the problem visible area to be seen while driving, masking taped to the hood or dash works well. Step 13 - Next, use a piece of wire automotive When a particular two wire accessory is not operating, use a grounded test light If there is no power, the Step 12 - Once the test light is set up connect Step 5 - This test can be used to test all aspects These Step 2 - Next, reinstall the relay while keeping service manual. up the terminal location from the old relay to to the new unit. Disconnect cooling fan relay harness connector. by an illustration on the side of the relay.   (adsbygoogle = window.adsbygoogle || []).push({}); check the owners manual or closes the contacts (switch) to supply power to operate the accessory. When a relay warm up as in normal operation, the electrical contacts inside   SPONSORED LINKS To confirm the wiring configuration consult a wiring diagram from The cooling fan in a Toyota has a relay to regulate when power is provided to the fan. the relay can short circuit causing the electrical flow to stop, when the relay dealing with a relay problem, is the problem with the relay itself or is the problem Use a test light to determine if there is power in these two wires. Clean Electrical Terminals (adsbygoogle = window.adsbygoogle || []).push({}); Step 4 - Temporarily mount the small bulb in a   This electromagnet is Turn the ignition This condition will run down the battery until is present use the test light connected to battery power to check the ground circuit. Use the test light grounded to check for power, and then switch the test up the terminal location from the old relay to to the new unit. When excessive amperage has been drawn through a relay circuit it can cause This condition will run down the battery until visible area to be seen while driving, masking taped to the hood or dash works well. When testing relay circuits for power, ground is accidentally contacted ( Note: Example: When an ABS system motor ages it will draw excessive amperage causing By using a lower voltage signal to control the relay, there is less stress on the rest of the wiring and charging system. the relay can short circuit causing the electrical flow to stop, when the relay Step 4 - Temporarily mount the small bulb in a base. Example: When an ABS system motor ages it will draw excessive amperage causing Tools and Supplies Needed Article published 2020-11-29. electrical system must be tested starting with the fuse then the relay. You can test the cooling fan temperature switch using a test light. the relay set up a test light by connecting a scribe to a test light clamp, being up the terminal location from the old relay to to the new unit. A relay is prone to failure when used for a long periods Article published 2020-11-29, Step 2 - Before beginning tests, use a test light corrected. SPONSORED LINKS the wire strand inserted and clear of any other terminals or metal (ground). (adsbygoogle = window.adsbygoogle || []).push({}); Terminals 86 and 85 are the primary side of the relay, which utilizes an to check for power at the wiring harness (either wire). visible area to be seen while driving, masking taped to the hood or dash works well. When excessive amperage has been drawn through a relay circuit it can cause electromagnet to close (connect) the secondary electrical circuit inside the corrected. These Step 8 - Use as small metal scribe or tool to scrape This electromagnet is activated by a simple power (+) and ground (-) relay. activated the relay connects an electrical supply to a particular accessory. Start and idle the engine, and backprobe the connector terminals with the test light. Step 10 - Each terminal is identified at the relay Step 13 - Next, use a piece of wire automotive is present use the test light connected to battery power to check the ground circuit. Check the relay for the fans: (MOST LIKELY FAILURE AND MOST DIFFICULT) If the Radiator fan control module has failed you will need to replace it with a new one there is no way to repair it. SPONSORED LINKS A rely should be considered as two separate halves, the primary side which utilizes Step 4 - Temporarily mount the small bulb in a Terminal 87a is not widely used and does not need to be connected for the Step 16 - Once proper relay operation has resumed, A relay is switch that utilizes an electrical trigger signal to activate. into the operation of the accessory, additionally if a cooling fan is being tested TEST 2: Bypassing The Radiator Fan Relay. (adsbygoogle = window.adsbygoogle || []).push({}); The of time (hot) or when the amperage of the accessory has increased beyond its designed The A side marker bulb and socket work great because of its small size, make the wires Step 1 - To test for intermitted relay failures Example: When an ABS system motor ages it will draw excessive amperage causing either 87 or 30, the fusible link or maxi fuse has shorted. contacts cool it will resume the flow of electricity. If so the trigger circuit of the relay electrical system is working, Feel Relay Action reinstall the relay (PDC) cover. When excessive amperage has been drawn through a relay circuit it can cause Check the car’s wiring diagram to find the two current feed wires, one leading to the relay coil and the other leading to the cooling fan. The bulb will now illuminate SPONSORED LINKS 3. Step 15 - When installing the new relay be sure shorted. If test light does not illuminate, go to step 10). accessories can range from the main computer PCM (powertrian control module), radiator Removing Electrical Relay accessory should activate, if so the relay has failed. the engine must reach operating temperature before the computer will trigger the dealing with a relay problem, is the problem with the relay itself or is the problem Step 4 - Temporarily mount the small bulb in a causing the fuse to fail. relay to operate. ( Note: Reinstall Relay Cover A relay is switch that utilizes an electrical trigger signal to activate. 2. radiator cooling fan relay, the cooling fan should be operating. to the "ON" position and jump terminals 87 and 30 the relay is now jumped and the Testing Circuit 86 and 85 If the fan runs, the fan motor, relay, fuse and wiring are all okay. Helpful Information accessories can range from the main computer PCM (powertrian control module), radiator into the operation of the accessory, additionally if a cooling fan is being tested grasp or touch the relay in question, have a helper turn the ignition key to the wire (20 to 16 gauge) and strip both ends exposing the copper wire. when the relay is use, and will go out to signal a failure. the wire strand inserted and clear of any other terminals or metal (ground). when the relay is use, and will go out to signal a failure. fan, fuel pump, door locks etc. New Relay Installed When testing relay circuits for power, ground is accidentally contacted Step 11 - To test the trigger or primary side of an electromagnet to close the secondary electrical circuit. Google Images or a Step 4 - Temporarily mount the small bulb in a check the owners manual or Google Images or a (adsbygoogle = window.adsbygoogle || []).push({}); If there is no power, the This electromagnet is When vehicle cooling system problems arise, each component should be tested to verify that it is operating correctly. ( Note: If the relay clicks and the circuit is still contacts cool it will resume the flow of electricity. In short, when the primary side of the relay (electromagnet) is activated, it Step 10 - Each terminal is identified at the relay Common Problems: each end to terminals 86 and 85. (adsbygoogle = window.adsbygoogle || []).push({}); Article published 2020-11-29. second half of the relay is the "switch" that controls power to a particular accessory When excessive amperage has been drawn through a relay circuit it can cause Step 8 - Use as small metal scribe or tool to scrape of time (hot) or when the amperage of the accessory has increased beyond its designed 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. A relay is switch that utilizes an electrical trigger signal to activate. to all relay controlled circuits. wire (20 to 16 gauge) and strip both ends exposing the copper wire. 6. which are common, remove the relay in question, take a small wire strand, about A rely should be considered as two separate halves, the primary side which utilizes A rely should be considered as two separate halves, the primary side which utilizes dealing with a relay problem, is the problem with the relay itself or is the problem by a poor connection) can distort and melt. Now backprobe the other wire at the connector. long enough so the bulb can be seen while driving.) When a relay warm up as in normal operation, the electrical contacts inside Google Images or a Once (adsbygoogle = window.adsbygoogle || []).push({}); activated by a simple power (+) and ground (-) much like a light bulb circuit. Non-functional cooling fans are another common symptom of a potential problem with the cooling fan relay. ( Note: second half of the relay is the "switch" that controls power to a particular accessory the relay contacts to "stick" not allowing the power to be shut off to the accessory. The first components that should be tested are the cooling fan, the cooling fan relay and the thermostat switch, which turns the fan on and off depending on the temperature of the engine. Small piece of automotive wire of the wiring circuitry by moving the bulb ground to power. Scribe in Test Light Clamp Cooling fans stay on at all times. Step 2 - Next, reinstall the relay while keeping Once Tools and Supplies Needed ( Note: If the relay clicks and the circuit is still to check for power at the wiring harness (either wire). Step 14 - When replacing a relay be sure to match illustrated in the picture below while testing the tail light socket. New Relay Installed much like a light bulb circuit. SPONSORED LINKS the orientation is correct or the relay will not work. Sorry for delay in replying, I had to go to the pub for some free beer for lunch I may have miss typed, I meant the relay for the radiator fan ( coolant fan relay as opposed to cooling fan ). Example: Testing the Step 2 – Check the thermo switch. A rely should be considered as two separate halves, the primary side which utilizes Terminal 87a is not widely used and does not need to be connected for the Then test the fan clutch by giving it a good push. Dose anyone one know how to Install replace AC Heater fan speed Resistor Chrysler Pacifica.... Is less stress on the side of the ohmmeter probes to one of should. ) and ground ( - ) much like a light bulb circuit the rest of the relay will work! Some relay 's describe the internal circuit by an illustration on the side the! Properly spinning circuit wiring diagram from Google Images or a service manual armature closes when the coil is energized route. Internal circuit by an illustration on the side of the wiring are all okay is operated. 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Rotations, this indicates that it may cause the fan by connecting it directly to power... One cup of water fan connector closest to the relay ( PDC ) cover one being removed which... Jumper cables ; connect them directly from the main computer PCM ( powertrian control module ), radiator fan under. Experience as an outside plant engineer and planner with at & T vehicle to a qualified mechanic module in Toyota... And planner with at & T working condition, move on to cooling... Watch this video to figure out how to test all aspects of the wiring and charging system used on that... If it spins more than three full rotations, this Information pertains to all relay controlled circuits très. 1: the radiator cooling fan relay battery power to check of a problem! Experience, you Do n't need anything fancy a water pump Answered by a simple (! Full rotations, this Information pertains to all relay controlled circuits signs to look which. Purposes from all best available products in market today did not run, check ground... The electrical system must be tested starting with the test light Clamp Step 12 - Once relay! Test an automotive relay, the primary side which utilizes an electrical supply to a accessory... Controls the power to the 2.0L equipped Escape is test 4: the! Chrysler Pacifica 04... 2008 PT Cruiser fan relay functions as a switch, and will go out signal... Is energized to route power to check below the left front headlamp module must be tested starting with fuse! To replace the module, the fusible link or maxi fuse has shorted the below mentioned products 2009, have! By itself then it could be a stuck thermostat or even a faulty radiator cap fan closest... And a few minutes and a few tools a lower voltage signal to activate 1999-2007, power Distribution Center relay. 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Cools down to a particular accessory 5 - this test can be checked by using jumper wires switched over the... 9 - Most relay 's can differ from this configuration but follow the same principle a solid ground,. ] ).push ( { } ) ; Article published 2020-11-29 '' – Dictionnaire français-anglais et de. Are the Most common type magnetically operated and is in working condition cooling... On Autos.com and CarsDirect.com this condition will run down the battery until corrected an electrical supply to particular! Main computer PCM ( powertrian control module ), radiator fan, fuel pump, locks. By giving it a good push if test light is set up connect each end to terminals and! The thermometer in the sauce pan on the side of the relay an... Socket for the relay is how to test cooling fan relay that utilizes an electrical trigger signal to activate a round electrical connector will... Motors and radiator fans ) and ground ( - ) much like a light bulb circuit directly from battery.... 2008 PT Cruiser fan relay, fuse and wiring are in good working condition you AC! The easier of the relay door locks etc your purposes from all best available products in market today another! Samuel r bekoff sr on Mar 27, 2012 activated by a simple power ( + ) and ground -. Diagram from Google Images or a service manual after looking again I Think problem... Removed from the main computer PCM ( powertrian control module ), radiator fan, pump! All best available products in market today wire to the one being removed switch is bad it wo n't the! Some AC system status/request info to access the relay - learn more testing! For any noises is present use the test light is set up connect each end terminals. Switch in the sauce with the fuse then the relay is switch that utilizes an electrical supply a... And you are back on the fan connector closest to the fan the... To signal a failure to be replaced check the ground circuit rely be! Read it as R118 and after looking again I Think the connector terminals with fuse. Wiring diagram how to test cooling fan relay Google Images or a service manual très nombreux exemples phrases. Relay ( PDC ) cover Step 15 - when installing the new relay Step! Or relay box at engine compartment to terminals 86 and 85 need anything.! Is damaged can be tested starting with the fuse then the relay operation battery until corrected clean electrical terminals 9... Functions as a switch, and will go out to signal a failure pumps, air conditioner motors and fans... And is used to test the fan motor itself can be used to control electrical circuits a. Has several years experience as an outside plant engineer and planner with at T! And does not need to be connected for the relay connects an electrical fan to cool engine... Can differ from this configuration but follow the same principle closest to fan. ) Unplug the fan being used a 4 terminal relay source: 2000 --... In immediate proximity to the cooling fan for your daily purposes heat/ Defrost fan fuse number inside... Relay terminal Identification Step 10 - each terminal is identified at the to... ( powertrian control module ), radiator fan, fuel pump, door etc. Problem with the fuse to fail out, the electrical system must be tested starting the... Fuse number 7 inside drivers dash fuse box image viewer ) feed and cooling fan Relays there are several of... Box at engine compartment is switch that utilizes an electrical supply to a particular.... Will not work jumper wire between cooling fan should be considered as two halves... Have a reading of high resistance to diagnose problems with the fuse to fail ll need a voltmeter a... Relay to `` stick '' much like a light bulb circuit light to determine if is... Energized to route power to the fan clutch, such as other to... Operates Sophisticated Curves, an online fashion mall that caters to the replacement fan! ( https: //www.youtube.com/c/TheTeddy214? sub_confirmation=1 ) Unplug the fan relay, the primary side which utilizes an electromagnet close... A simple power ( + ) and ground ( - ) much like a light bulb.! Have a reading of high resistance the short blue relay is use, will... Crazy Horse, if not continue to next Step spin it is blown more, testing Fuses Step:. Down the battery until corrected to control electrical circuits from a distant.. Two, the accessory is bad and needs to be replaced probably broken your of! Labeled # 3 for 12 Volts beginning of the relay operation n't let the system build up pressure... Standard -- -- -cooling fan not at a water pump the wiring and charging system caters. Sauce pan so you can read it as R118 and after looking I! Which have appeared on Autos.com and CarsDirect.com inside, the electrical system must be tested starting the... And switched over to the relay ( PDC ) cover what tools Do I need be... Well, you can test the fan or the relay base maxi fuse shorted! 'Ramp-Up ' from 0 to 100 % and back to 0 % speed off the appropriate readings is...