Question about Jeep Grand Cherokee

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I have a 2003 grand cherokee lareado 4.0 inline 6 engine. the radiator electric cooling fan does not work. have verified that the motor does work. I have purchased a new sending unit but can not find location of the unit on the motor. can you advise?

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Were is the temperature sensor location on a jeep grand cherokee yr. 2004 with a 4-0 engine inline 6 this sensor runs the cooling fan on the radiator


The coolant sensor is in the front the thermostat housing that the top radiator hose goes to has the sensor in it, but if your wandering cause your cooling fans do not work it's most likely not the sensor. The largest proble I have seen with them is the cooling fan relay, the part is roughly $60-80.00, but that's the easy part, a shop will charge you out your rear to do it cause technically you should remove the complete whole front facia and bumper assy to do it, but there is a trick, if you plan on fixing this yourself let me know I'll clue u in on a little bit easier way.. Oh generally when the relay goes bad you will also have a check engine light on as well!! Usually cooling fan relay control circuit!

Jun 11, 2012 | Jeep Cars & Trucks

2 Answers

Which cooling fan is the primary on a 99 jeep grand cherokee ???


The main cooling fan on this 1999 jeep cherokee, the main fan all depends.

These jeeps come with diffrent fan set ups. Here are a few, the first may be a fan driven off the motor by a fan belt and a another fan which is electric. the primary fan used for cooling is the fan that runs off the engine with a belt. the other electric fan is more the air conditioning system, this fan is used for cooling the condensor mainly. the engine driven fan is for the cooling system.


Another system fan set-up on these jeeps would be the motor driven fan by belt with another electric fan in front off it, the diffrence between the first and this one is that the first fan system is side by side and this one is set-up one in front of the other but the concept is the same, the fan driven by the engine is mainly for the cooling of the engine coolant and the electric fan is for air conditioning cooling.

In both set-ups the electric fans also help the cooling system but are mainly used for the help in cooling when the a/c is turnned on, the a/c condensor builds up heat the same as the radiator does, one fan is unable to cool both the radiator and the condensor, this is why some cars have two fans.

Good day, hope this is helpful,

Mar 18, 2012 | Cars & Trucks

1 Answer

Jeep Grand Cherokee running hot. I've changed the


Check your radiator for external and internal obstructions (leaves, bugs etc on the a/c condenser or leaves between the condenser and radiator, rust or calcium deposits inside the radiator core all cause loss of heat transfer)
Also make sure that the system is full and that the electric fan and the clutch fan are operating properly. (electric fan should come on just above normal operating temp and clutch fan should not be "freewheeling" above temp either)
Note: If you need to have the radiator flushed, do it separately from the engine. especially the inline 6 and 4 engines rust up inside and if the system is flushed with the radiator connected, the debris will pack up inside it and actually can worsen the condition.

Apr 23, 2010 | 1999 Jeep Cherokee

1 Answer

I have a 2003 Jeep Cherokee Laredo, 6 cyl, which has a 2 year old radiator, changed thermostat, water pump, the fan runs, and still overheats to the point the engine raddles and turns off. The radiator is...


SOUND LIKE COOLING FAN NOT WORKING.YOUR VECHICLE HAS A HYDRALIC ELECTRIC COOLING FAN CONTROL BY PCM.TAKE JEEP TO THE GARAGE THEY HAVE TO USE A DRB 3 SCAN TOOL TO PULL UP ANY FAULT CODES.

Apr 19, 2010 | 2004 Jeep Grand Cherokee

1 Answer

How do i change a water pump on 1996 grand cherokee limited V8


I'll assume you have a 4.0l

The 4.0L engine is equipped with a reverse rotation (counterclockwise) water pump. The word REVERSE is stamped or imprinted on the cover of the viscous fan drive and on the inner side of t he fan. The letter R is stamped onto the water pump impeller. When replacing water pump, ensure proper pump is installed. Installation of the wrong water pump will cause engine overheating.

NOTE:On models with 4.0 L engine, front grill must be removed to access radiator draincock. Draining cooling system can be accomplished by removing drain plug from side of block as well as by loosening radiator draincock. Drain plug is located on lower left side of engine block.

Disconnect negative battery cable. Drain cooling system. Disconnect electric cooling fan connector. Remove electric cooling fan and electric fan shroud assembly (if equipped).
Loosen, but do not remove, 4 water pump pulley-to-water pump hub bolts and 4 viscous fan-to-idler pulley nuts. Remove accessory drive belt. Remove 4 viscous fan to idler pulley nuts, and remove fan and shroud together.
Remove 4 water pump pulley bolts and remove pulley. Remove power steering pump and bracket. Disconnect heater hoses and lower radiator hose at water pump. Remove 4 water pump retaining bolts. Remove water pump.

to install just reverse procedures

Apr 05, 2010 | 1996 Jeep Grand Cherokee

3 Answers

Vehicle is overheating


electric fans or belt driven? if electric are they kicking on?

Feb 22, 2010 | 2003 Jeep Grand Cherokee

1 Answer

1999 jeep grand cherokee laredo is engine fan belt driven or electric?


The radiator cooling fan used on the 4.0L engine is
an hybrid fan design. The hybrid fan system consist
of a low speed viscous driven mechanical fan and a
electrical fan.
The hydraulic fan used on vehicles equipped the 4.7L engine, replaces both the electric fan and the engine driven mechanical fan. The hydraulic cooling fan is integral to the fan shroud and is located between the radiator and the engine. The power steering pump supplies the hydraulic fluid and pressure to rotate the cooling fan blade, while the electrical part of the fan is controlled by the JTEC. The hydraulic fan drive (motor) consists of the three major components:
- Steering flow control valve
- Fan control valve
- Two stage G-rotor hydraulic drive
The hydraulic fan and drive is not serviceable.
Therefore any failure of the fan blade, hydraulic fan
drive or fan shroud requires replacement of the fan
module because the fan blade and hydraulic fan drive
are matched and balanced as a system and servicing
either separately would disrupt this balance.

Oct 29, 2009 | 1999 Jeep Grand Cherokee

1 Answer

I have a 1999 grand Cherokee limited 4.0 v6 engine. It over heats like every 6 months. My michanic tells me my computer program needs to be uninstalled then reinstalled. Is this something that happens alot...


never heard of this before ,i have worked on quite a few jeeps here in spain but never had this before .power steering yes ,radiators yes ,funny american electrics big time ,does yours have the manual fan and a back up electric fan or is it all electric fans .Quick tip ----if it starts to run hot ,put the heater on screen and blower on full this will keep the engine cool ,if no heats comes out of heater then stop because you have no water in the rad

Oct 23, 2009 | 1993 Jeep Grand Cherokee

1 Answer

Radiator fan not turning motor fan just replaced


check the coolant fan switch. on 4 cyl. engines it 's mounted on the driver side of cylinder head. on 6 cyl. engines it's mounted on the intake manifold, just above the water pump.there will be 3 sensors,it will be the one on the left. good luck

Nov 29, 2008 | 2003 Jeep Grand Cherokee

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