Check for harness damage between terminal No. Some added restrictors or slowed water pump speed that prevented the coolant from being forced out, and allowed the engine to run cooler. It is a stand-alone unit that is not effected by the computer or anything else. This removes the load from the dash harness and is recommended for old under-wired musclecars or any vehicle upgrading to high-power halogen lights. Abnormally high temperatures can also be caused by a variety of other problems so it is recommended to have the vehicle properly diagnosed to be sure of the problem.
Black wire from plug is connected to chassis ground. The relay activates and provides power to the radiator fan. Get the 10 gauge wire and place it through the hole in your fire wall. Most cooling fans use that have a moderate to high current draw, and as a result are commonly controlled using relays. Can someone give me something else that I can test or perhaps point out something I am over looking? Engine Cooling problem 6 cyl Two Wheel Drive Automatic 940000 miles I have a 2004 Jeep Grand Cherokee and I need to replace the fan control relay. Higher coolant pressures also transfer heat from the cylinder heads more efficiently.
If the voltage when the radiator fan is operating is less than 0. Usually a faulty cooling fan relay will produce a few symptoms that can alert the driver that. Here we'll show you how to wire the cooling fan relay in a single and dual speed configuration. You can also find other images like wiring diagram, parts diagram, replacement parts, electrical diagram, repair manuals, engine diagram, engine scheme, wiring harness, fuse box, vacuum diagram, timing belt, timing chain, brakes diagram, transmission diagram, and engine problems. If fan control relay is not okay, replace it and retest. Locate the relay in immediate proximity to the fan being used. Red: Connect to the red wire of fan pigtail with pre-terminated yellow crimp.
If the condenser fan runs, the relay is bad. Use a good ground such as the steering column or the dash mount bolt at the kick panel for the ground. Since my engine is not stock 1971 Riviera 455 cubic inch big block the cooling fan previously that was installed is just not enough to cool it down. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. Black: Connect ring terminal to chassis ground. These pins should have power at all times, even with the key out of the ignition. Cooling fans stay on at all times If the , this is another less common symptom of a possible problem with the cooling fan relay.
If both fans run but the engine overheats ©, 2017 Rick Muscoplat. Attach the wire to the relay with a female blade to the negative side, which is the last free terminal. Just cut the insulation off of the 16-gauge and twist the wire end and insert the 10-gauge and the 16-gauge together into the wire connector and crimp it. After letting the car cool down for 45 mins I proceeded to destination and the temp stayed normal, 210 degrees. Top bracket was installed at least 2-inches below the top of the core. The car overheated the other day and threw a P1491 code causing the Check Engine light to come on. Grey wire is connected to the thermostat sending unit terminal with the blue ring crimp connector provided.
At the end of the power wire and the end of the firewall wire put a butt connection between them and clamp it together to make it stay in place. In the event the cap vents due to excessive pressure, the air will escape first. Remove the negative terminal of the battery first so that there is no chance of sparks. If the voltage when the radiator fan is operating is 0. If the relay shorts internally, it may cause power to be permanently switched on, which will cause the fans to run at all times. Complete illustrated installation instructions make the installation simple.
I have tested the ground on the fan connections as well. Check for harness damage in Red wire between terminal No. Which one to choose depends on the type of system your vehicle is equipped with. When these systems were pressurized by adding a pressure release cap to the radiator, excess coolant created from expansion was vented to the outside. And radiator fan relay wiring diagram has been published by Benson Fannie in category field. I am not sure if the fans rely on the Engine Coolant Temp Sensor to provide feedback for the fans but the wiring diagram indicates that it is speed not heat that turns on the fans there are two speed sensors inline with the fan control -- according to the Haynes Manual I am using. It drew air through the radiator when the forward motion of the vehicle was too slow to create enough airflow through the radiator.
Often times the fan motor is no longer available and a new universal fan motor is needed. In no way does Wiring Diagram Pictures claim ownership or responsibility for such items, and you should seek legal consent for any use of such materials from its owner. When installing an auxiliary fan or simply wiring the factory fan so that the driver can manually turn the fan on and off, make sure the fan is turning in the right direction. If I pull the relay and bridge terminals 2 and 5 inside the fuse box the fans come on and they are strong. This is where you add coolant if the system is low. Circuits with long wire length and multiple switches and connections inevitably have a certain amount of voltage drop caused by normal resistance buildup; deterioration from vibration, high temperatures, and corrosion only compound the problem.
We settled on this combination after considering all of the previously mentioned factors. The coolant temperature sensor feeds the computer the engine temperature. Both receive power from fusible links, not ordinary fuses. Components to accomplish this can be bought at the local parts store but the job is made easier when one of the many fan control kits is utilized. Is there another hiding place for this relay? In normal operation, the +12 volts comes from the ignition switch to the thermostat. Since the wire is now connected we need to do a safety tip! Many mistakenly believed that these situations were caused because the coolant was flowing through the radiator so quickly, that it did not have time to cool. I would swap the sensors depending on the season.
Check for harness damage in Yellow wire between fusible link No. Maybe you would like to perform this test? These engines operate at lower temperatures and coolant loss can occur in an open system if the system overheats. Automotive Wiring Diagram Ideas Electric Radiator Cooling Fan img source : vehicledata. However, the coolant is not drawn back into the system as it is with the closed system. Run a ground wire on the other terminal of the switch. The key player in keeping our system operating within the proper range is the fan control. This will take around 45 min to do or maybe less if you have some experience with cars and electricity work! Nice but a few suggestions i might add is you add a relay too save your switches from arching.