First, isn't that covered in your warranty? Check with the dealer.
I bought my '02 Certified Preowned and it was not covered. They wanted $185 to replace the relay.
As for fixing it yourself here is the closest thing I have found...
It shows you where the bugger is. I will try to find a replacement part and do it myself.
Hi I have done the radiator fan relay replacement ( pulse width modulator) Jeep grand chrokee.
First stand in front of the jeep. Remove gently the left front headlamp . A hole will need to be cut in the plastic at the bottom OR you can remove the entire front bumper to access the rad fan relay. New ones are about 120 from the dealer less at discount places .
It's the square part with the blue label and wire coming from it.
Replace all pieces .. level of difficulty
Need to have good mechanical abilityNewThe part Chrysler supplied came with an incorrect diagram and instructions. The note said the "LEFT" headlight and the diagram illustrated this along with a note to remove the air snorkel. Your answer was the correct direction. It is the left headlight as you FACE the car. The headlight was removed by taking out the 10mm stem nut and gently using a pry bar, outside edge first, then inside edge. Trying to remove the headlight rapidly will result in a broken plastic tab that will need to be epoxied.I used my 2" hole saw to create an access by cutting through the headlamp plastic cavity behind the headlight, a strong light will reflect onto the relay and you can see the bracket part below and between the battery and front frame toward the front of the car. With the headlight assembly out, I prised the white ball socket fittings and oiled them for ease of refit. The piece of the cavity was saved because it is critical to keep water out of the relay area. There is a small red tab on the connector of the relay that needs to be pressed and the red tab moved to the side. Then insert a screwdriver into the bottom of the connector to release the black plastic tab that locks the connectors together. Hold the new relay in your hand. Push the red tab back across the connector body and push the two halves together, they will now lock It is critical that a good flat install be performed or the part will fail and you're out $75 and the time to redo it all over again. Use the new screws in the part bag, the old ones will not tighten enough for a good grounding of the part. I used metal Duct Tape to tape the plastic piece back into the hole and then sealed it with two more pieces. Pressing the headlight assembly back works best if you start from the outer edge and then press the bottom edge in.
Addition to New ...
I used those instructions and it worked well...couple of things for clarification; after I popped the headlight out, I had to drill the 2" hole in the bottom, left hand side of the headlight compartment. The relay is under that side of the compartment. Once you get that opened up, the rest is fairly simple.
Also - my fan stopped operating several months ago. Before I realized it was the fan, I changed the water pump (it died at the same time), serpantine belt and thermostat (the vehicle had 95,000 miles on it, so it was due). It was at that point that I realized it was the fan that wasn't clicking on - I tested the current and it was getting an electrical charge at the appropriate time, but wouldn't kick on. I bought an after-market fan at Advanced for something like $160. It worked like a charm until about a month ago, and then it stopped working again. I took it to the dealer and was told that it would cost $760 to replace the fan and relay. The guy told me that the relay was melted. I didn't believe him, but I bought an after-market relay anyway and changed it tonight. What I found was that the connection between the fan and the relay was melted. So after changing the relay I just cut that connection out and nutted and taped the wires together, wrapping them very well for protection from moisture - and now it works perfectly.
Morale of story - before taking your Jeep to the dealer and letting him snow you into a new fan and relay, check that connection; then consider the relay, then consider the fan. You can change each of them yourself with relatively little trouble and keep the $760 for something more fun.
the above answer was very helpful. i installed the relay switch in my wife's 2002 grand Cherokee for $65. the jeep was overheating and the air was coming out warm. i thought the fan wasn't coming on so i replaced the switch and it fixed the problem. thanks
2009-07-26 All is correct; however, I was unsure were to cut, I used a flashlight & mirror to search for the relay behind the plastic portion of passenger side headlight cavity. The outside edge of the hole that you will need to cut starts about 3-4 inches from the outside edge of the cavity, this will make your center being about 7-8 inches from the edge. The relay is on a slope and you will need an elbow extension or will need to cut more plastic closer to the front of the vehicle - best of luck
It appears that the relay (which is a solid state [think transistor] unit) is subject to heat failures. When I replaced mine I used a paste that is made to help conduct heat from solid state devices to heatsinks. That helps conduct the heat from the relay to the metal frame. The paste is a white silicon based material made by Wakefield and available from electronics parts distributors. I think that Radio Shack still carries it in a small, less than an ounce tube that will suffice for a couple of these relays.
Addition to answer:
In trouble shooting I still found that I had 12 volts at the fan. Therefore I thought it was the fan motor not working. I bought two new fans neither one worked. I did not install them. Just plugged them in. The fan relay switched had already been replaced 3 years earlier with an after market from Oreily. It turned out to be the relay again. It was allowing 12 volts but could not handle the motor load. Oreily gladly replaced the switch with their life time warranty. Only out a few hours of time being stranded and chasing around for fan motors.
The radiator fan switch on a 1989 Jeep Cherokee is located on the driver's side fender wall inside the engine compartment. It is a box about 1inch by 1inch just below the battery location.
the relay is behind the r/f headlight assembly. remove it and the grille it will be below the assembly mount 3 wires green, green andwhite, and brown i think
You have to remove the right headlight assembly, the relay is located underneath the plastic housing below the headlight You can cut a small hole in the housing to gain access to the relay
How I can replace ignition switch cylinder from Isuzu Rodeo?.
switch itself or key cylinder?
How do you replace the safety neutral switch on a 1995 Jeep Cherokee 5-speed transmission and Where is the safety neutral switch located?
look underneath near the radiator bottom. Could be mounted on the body.
No, not if it is not defective. If the ignition switch is defective then that is all you need to replace.
On the accumulator cylinder located on the passenger side
Are you asking about the key cylinder or the actual electric switch?
Try at the rear of the radiator approx. 1/3 down from the top (FAN SWITCH) Rear driver side of the cylinder head or on the thermostat housing. (gauge sender)
Typically this is a failure of the headlight switch assembly. See the question about how to replace the headlight switch in a 1991 Cherokee for the answer of how to accomplish.
how do you replace ignition switch on a 1992 Chevy cavalier 2.2 4 cylinder
On my 96 Cherokee Country there is a button on the underside of the switch that releases the knob and shaft and the shaft just pushes back in until it catches.
The cylinder should not be worn out on a 99 car unless you were using a very heavy key chain. I would just replace the ignition switch if the cylinder works OK. You also might try some Graphite lube on the cylinder.
The ignition lock switch is found under the steering column on a 2004 Honda Civic. Remove the steering column and ignition switch. Loosen the mounting screws that hold the cylinder in place. Pull and replace the lock cylinder.
The computer uses the coolant temperature sensor to decide when to run the fans. It is below the radiator cap on the cylinder head.
The neutral safety switch and backup light switch are one in the same. You have to replace it. It is located on the transmission where the shifter connects to it.
how DO YOU REMOVE AN IGNITION CYLINDER FROM A MALIBU CHEVROLET 2000
Possible culprits: Faulty water pump; clogged radiator; faulty radiator fan; faulty radiator fan sensor switch. Possible way to locate problem: Raise hood and start the car; watch for fan to start when engine warms. If no start, problem lies with fan or sensor switch. After car cools down, hotwire fan to see if it runs, if not, replace fam n=motor; if yes, replace sensor switch. If the fan kicks on and still overheats and blows coolant into the overflow reservoir, you may have a bad radiator cap.
The radiator fan sensor switch or the radiator fan motor are at fault (maybe even both). Wire the fan motor direct to see if it will run, if it does, replace the sensor switch. If the fan motor doesn't run, replace the fan motor before you buy a new sensor. If after replacing the fan motor, the fan still doesn't run, then replace the sensor.
the neutral safty switch is located in the trans range switch if you have an aw4 auto trans replace or clean and reinstall the switch
I believe you are refering to the thermal switch for the electric fan. The switch is located on the bottom tank of the radiator on the driver's side (left-hand drive), just above the drain plug. This switch is a thread-in type with two round prongs where the wires connect. To remove/replace, drain the radiator first, then using a 21 mm socket or wrench, unthreadd the switch from the radiator. There is a second switch which threads into the thermostat housing loacted on the back on the engine head. This switch is part of the emmission control system and also controls the electric fan. Before you remove or replace the radiator switch, disconnect the wire from the thermostat housing switch first, to test the rad switch and electric fan. (I had to do this job just last weekend). Cheers Malcolm
on my 2000 grand Cherokee Laredo is under the passenger head light is hard to get to is a Little black box w. 2 screws on it hope the helps..