Question about 2002 Jeep Grand Cherokee

1 Answer

0verheating ,, the electric fan does not seem to be operating, even with the air conditioning on, I jumped the sensor wire, but it still does not turn...temperature exceed over 250 degrees, and hotter. fan is still off

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Jeep Master
  • 22,326 Answers

Check fan direct from battery ,if it doesnt work replace it first

Posted on Jun 20, 2009

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

It seems to be my fan temp over norm fan not on I don't know if it runs all the time or not? how do I test the fan?


Here are basics, specifics can be found with the furnishment of make, model, and year of vehicle.
Since the mid-80's, and the re-positioning of the cars engines , there
have been electric fans mounted near the radiator to cool it.
If the vehicle has air conditioning as an option, there are then usually 2 electric fans, one of which is for the A/C.
With few exceptions, the "engine fan" only runs when the temperature sensor screwed into the engine block sends a message indicating an overheating situation.
In some cases, then, the "engine fan" will continue to run after the engine has been turned off, and even when you have left the car parked, if the engine is still hot.
Traditionally, the A/C fan will only run whilst the A/C is turned on.
To test the fans, you will need to unplug the fan from the harness and introduce a "hot" wire and also a "ground' wire to the two different wires that connect the fan to the car.
God bless your efforts.

Sep 22, 2017 | Cars & Trucks

2 Answers

98 Honda civic cx over heating when stopped in traffic - I went thru cooling system, replaced hoses, thermostat, fan, radiator cap. After that stated to overheat on freeway after about 40 miles. pulled...


Unplug the fan on sensor. It should have one green wire and one black wire. Use a paper clip and jump the two wires. Turn the key to the run position, the engine does not need to be running. Does the fan come on? If not check the green wire for 12 volts and the black wire for ground. If there is no ground than run a new ground wire. If the is no power check the heater/air conditioning fuse in the under dash fuse block. If there is power and ground make sure both the cooling fan fuses are good and both the cooling fan relays are good.

Sep 05, 2013 | 1998 Honda Civic

1 Answer

Cooling fan wont come on when the temp gets past half


if its electric fan the motor might be going out also it should have a sensor thats not reading or letting it come on when it suppose to

Oct 13, 2012 | 1996 Chevrolet Cavalier

1 Answer

I CAN 'T GET THE COOLING FAN TO WORK BY IT'S SELF


The fan can be driven by a drive belt off of the crankshaft or it can be operated electrically. Regardless of the design used, inspect the fan blades for stress and cracks.
Electric fans are also inspected for damage and looseness. If the fan fails to turn on at the proper temperature, the problem could be the temperature sensor, the fan motor, the fan control relay, the circuit wires, or the controller. To isolate the cause of the malfunction, attempt to operate the fan by bypassing the control. On a computer-controlled system, this can be done by using a scan tool to activate the fan. If the fan operates, the problem is probably in the coolant temperature sensor.
It is also possible to check fan function by jumping the fan relay to attempt operating the fan motor. If the fan operates, the relay may be the faulty component; however, additional tests will have to be performed on the control circuit of the relay.
A jumper wire can also be used to jump battery voltage directly to the cooling fan. If the fan motor fails to operate, check for proper ground connections before faulting the motor.
To direct air flow more efficiently, many manufacturers use a shroud. Proper location of the fan within the shroud should be at lease 50 percent inside the shroud. If the fan is outside the shroud, the engine may experience overheating due to hot under-hood air being drawn by the fan instead of the cooler air. If the shroud is broken, it should be repaired or replaced. Do not drive the vehicle without the shroud installed

May 08, 2012 | 1996 Pontiac Sunfire

1 Answer

1994 BMW 318i runs hot, just recently had the fan clutch and thermostat replaced and its fine. This seems to happen when I turn the AC on. I am a novice is there something I can do myself to check the air...


There should be an electric fan in front of your radiator. Check to make sure that it turns on whenever the air conditioning compressor kicks on, or whenever the car is too hot. If not, the electric fan may have failed, but the most common failure point is the relay for the electric fan.
There may be a temperature sensor in the end-tank on the radiator with a three wire plug. That is supposed to turn on the electric fan when the engine gets too hot. If you short the two hot wires to the brown ground wire with the key turned on, you can test to see if the relays work for the high and low speed settings. If the contacts have burned away in the relay, you will hear it click but the fan won't turn on. The sound will help you find the relay.

Jul 13, 2011 | 1994 BMW 3 Series

1 Answer

Keeps running hot we changed radator cap and fan is not working right we changed a sensor and didnt stop it


In all probability, the fan is working erratically, or the air conditioning fan is not working at all. Does the vehicle run cooler when the air is off?. Do two things: 1) Check that the fan works after the vehicle has idled for a few minutes, and shows a normal temp (halfway on the gauge). 2) Check that the secondary /Air conditioning fan trips as soon as the A/C is turned on, even if the vehicle is cool.
On the event that either fan does not work, unplug the connector to the fan and check that it receives electricity. If it does, the fan is bad, and if it doesn't, something is wrong with the wiring or the sensor.

Jun 24, 2011 | 2000 Honda Accord

3 Answers

2005 chrysler 300c 5.7l v8 hemi.........over heating electric fans do not come on......however when fans are checked individually they work....the two fuses and the 3 relays check ok......made check with...


The fans are turned on by the PCM, if the PCM is not telling the fans to turn on, they won't even if everything tests fine.

2005 Chrysler 300 V8-5.7L VIN H

Coolant Temperature Sensor/Switch (For Computer): Service and Repair
ENGINE COOLANT TEMP SENSOR
REMOVAL
The Engine Coolant Temperature (ECT) sensor (3) on the 5.7L engine is located under the air conditioning compressor. It is installed into a water jacket at the front of the cylinder block.
WARNING: HOT, PRESSURIZED COOLANT CAN CAUSE INJURY BY SCALDING. COOLING SYSTEM MUST BE
PARTIALLY DRAINED BEFORE REMOVING THE COOLANT TEMPERATURE SENSOR.
1. Partially drain the cooling system.
2. Remove accessory drive belt.
3. Carefully unbolt air conditioning compressor from front of engine. Do not disconnect any A/C hoses from compressor. Temporarily support
compressor to gain access to ECT sensor (3).
4. Disconnect electrical connector (2) from sensor (3).
5. Remove sensor (3) from cylinder block.
INSTALLATION
1. Apply thread sealant to sensor threads.
2. Install ECT sensor (3) to engine.
3. Tighten sensor to 11 Nm (97.3 inch lbs.) torque.
4. Connect electrical connector (2) to ECT sensor (3).
5. Fill the cooling system.

Sep 10, 2009 | 2005 Chrysler 300

1 Answer

Electric fans don't run, but checks Ok. Air condition not working. compressure checks Ok,but clutch not engageing but can jump wire clutch to engage. All fuses checks good,


FIRST IS CHECK ENGINE LIGHT ON....YOU SHOULD BE ABLE TO UNPLUG THE ECT... ELECTRONIC COOLING TEMP SENSOR.....A TWO WIRE SENSOR THAT TELLS THE COMPUTER THE TEMP OF MOTOR....WHEN THE MOTOR TEMP GETS HIGH THE COMPUTER GROUNDS THE COOLING FAN RELAY TO TURN FANS ON..IF FANS DON'T RUN WITH SENSOR UNPLUGGED THE GET A SMALL PIECE OF WIRE AND FOR A SHORT TIME SHORT THE TWO WIRES ON THE PLUG FOR SENSOR...IF IT DOES COME ON REPLACE SENSOR IF IT DOES NOT COME ON SUSPECT COMPUTER...ONLY IF ALL FUSES ARE OK LET ME KNOW

Sep 03, 2009 | 1994 Buick Century

1 Answer

Radiator fan


You should check the 30 amp "RDI" fuse and the 7.5 ECU-IG fuse. Both fuses are critical to the operation of the fan system. The RDI fuse sends power to the fan #1 relay. The A/C amplifier turns on power to the fan #1 relay, this is why your fan works on A/C.

Now, with no cooling fan under "normal conditions" (A/C off), you need to have a good fan #2 relay, and a good water temp switch. This switch is on the engine, near the thermostat housing (I think); with a single plug, with a white with a blue trace wire going to it. Remove this wire from the sender, and jump it to ground (anywhere on the metal of the engine) with the key on (engine OFF). If the fan starts, you need a new water temp sending unit. If not, then consider a new fan #2 relay. This system is pretty simple.

Sep 24, 2008 | 2002 Toyota ECHO

Not finding what you are looking for?
2002 Jeep Grand Cherokee Logo

Related Topics:

97 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts

yadayada
yadayada

Level 3 Expert

78267 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Kevin Daniels

Level 3 Expert

1455 Answers

Are you a Jeep Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...