2003 Jeep Grand Cherokee overheating - Page 2 - JeepForum.com
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post #16 of 34 Old 01-31-2011, 11:32 PM
garthfan0523
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2003 WJ 
 
Join Date: Mar 2009
Location: Manchester, NH
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My relay failed on me almost immediately after I bought my WJ back in December '07. After reading and reading and reading all the hundreds of posts in a dozen online forums about the stupid faulty relay and poorly-designed connector and hard-to-access location, I decided not to even fuss with it.

I wired the fan directly to the battery with a toggle in-cab. Problem solved. Very, very rarely ever need to activate the fan during the winter, seldom need to during the cooler spring and fall months unless I'm sitting in traffic. During the summer, I just check the temp gauge every now and then and activate the fan as needed. When driving, the ambient airflow through the grill is more than sufficient to cool the fluid in the radiator so I really only activate the fan when I'm sitting in traffic or driving slowly through city streets.

Been running it that way for two years, now, with absolutely no ill effects whatsoever to the fan, the wiring or the toggle. Just be sure to get appropriate-gauge wiring and toggle to handle the current loads.

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post #17 of 34 Old 02-01-2011, 08:54 AM
skitch3000
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2002 WJ 
 
Join Date: Jun 2010
Location: Rochester, NY
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had this problem a couple months ago. fan would work when directly connected and thermostat seemed to be find. replaced the relay and haven't had any problems since
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post #18 of 34 Old 02-01-2011, 09:04 AM
PhantomWJ
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Definately consider your temp relays but also ensure the you "bleed" you cooling system by eliminating any air that may be trapped....this is common...and can produce the symptoms you described.
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post #19 of 34 Old 02-02-2011, 09:52 AM
Big-Z
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I and two guys from a shop concluded after looking in and out for the relay behind the headlight, and it does not exist. (its a 2004 electric cooling system GC) My fan wont come on at all. I cut the wires (two blue and one black) and I hooked it directly to the battery. the fan would not turn on. I hooked the blue to the + and the black to the - and the fan still did not come on. could that mean its a bad fan? did I hook the wires to the battery right?

thanks
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post #20 of 34 Old 02-03-2011, 08:20 AM
jgc86
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The relay is located under the passenger headlight. The easiest way to get to it is to take a hole saw for a drill and cut throught the plastic under the headlight. I loooked it up online to make sure i didnt screw it up.
, hopefully that link works. Also here is the image attached just to make sure you get it.
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post #21 of 34 Old 08-18-2011, 06:25 PM
tastefulclient
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2003 Jeep Grand Charokee

my car overheats when idling, i changed the thermosat, changed the senor and it's still overheating when im sitting at the light. please help. the fan does come on so im at my wits end..Please help.
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post #22 of 34 Old 08-18-2011, 06:37 PM
4Tom
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Quote:
Originally Posted by Big-Z
I and two guys from a shop concluded after looking in and out for the relay behind the headlight, and it does not exist. (its a 2004 electric cooling system GC) My fan wont come on at all. I cut the wires (two blue and one black) and I hooked it directly to the battery. the fan would not turn on. I hooked the blue to the + and the black to the - and the fan still did not come on. could that mean its a bad fan? did I hook the wires to the battery right?

thanks
I was reading the 04 is different to 99-03

For 2004 only
Fan is two speed. So will have 3 wires.

There is two fan relays both located in main distribution unit beside battery.

99-03
Single speed fan 2 wires
Fan relay under headlight.

Hope this helps

Sent from my iPhone using JeepForum

WJ 2001 3.1TD
http://www.jeepforum.com/forum/f22/2001-wj-3-1td-1252959/

Tom
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post #23 of 34 Old 08-19-2011, 08:56 AM
tastefulclient
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Quote:
Originally Posted by PhantomWJ View Post
Definately consider your temp relays but also ensure the you "bleed" you cooling system by eliminating any air that may be trapped....this is common...and can produce the symptoms you described.

what do you mean by "bleed"...like drain the radiator??
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post #24 of 34 Old 09-24-2011, 08:15 PM
jeepsmsc
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Wanted to share my experience. Have a 2003 Grand Cherokee Laredo 4.0L I6. 100k miles. Engine was overheating at idle when a/c was turned on. Took it to Jeep dealer. They diagnosed fan relay. They replaced fan relay for $225. I then left dealership and within minutes experienced same overheating problem when a/c turned on and vehicle at idle. Took it back to dealer. Dealer diagnoses fan / motor. Puts in new fan motor assembly for $320. Total out the door cost for both fan relay and motor is $545. Not sure if the fan relay was really the problem in the first place or if both the relay and motor were bad. Any thoughts? Did dealer charge a fair price? Also, this fan relay/motor overheat issue seems to be a recurrent problem for a lot of Jeep owners. Is there a class action on this fan relay / fan motor issue? Seems like a flawed Chrysler design.
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post #25 of 34 Old 09-24-2011, 08:17 PM
purplecty
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Location: Chicago
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Imho u paid way 2 much... And it will happen again when warranty expires... Ask me how I kno...

Pearl Blue WJ Laredo 4.0-(180,xxx Miles) - K&N High Flow Drop In Air Filter Otherwise COMPLETELY STOCK!!!
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post #26 of 34 Old 09-24-2011, 08:22 PM
jeepsmsc
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Quote:
Originally Posted by purplecty View Post
Imho u paid way 2 much... And it will happen again when warranty expires... Ask me how I kno...
Thanks for the candid feedback on the overpay. I'm not a mechanic so doing the repair myself wasn't really an option. What's a fair market price for the repair? How frequently do the relays and fans go out on your model? This is the 2nd relay I've had put in. Last relay was at 55k.
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post #27 of 34 Old 09-24-2011, 09:13 PM
purplecty
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Dont take it the wrong way sorry my first few times I had my family mechanic replace with oem relays but only would warranty it for 1yr... Every 2 years theyde go out... Finally I found jeepforum ad learned instead of taking off bumper and grille u can take out passenger side headlight cut.a hole in bumper and there will b the fan relay. I opted to do myself since I knew it would happen again... Bought relay from autozone for like 55 with lifetime warranty and when they blow I get free replacement... neways dealers always charge 2 much find a independent shop u can trust... This is a job u can do easily. I am no mechanic by any means myself... This is probably at least. my 5th relay... Do some research on forum. Good luck 2 u... Its a design flaw

Pearl Blue WJ Laredo 4.0-(180,xxx Miles) - K&N High Flow Drop In Air Filter Otherwise COMPLETELY STOCK!!!
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post #28 of 34 Old 09-22-2014, 08:38 PM
vluis
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hey guys I think this is my first post, I want to say thank you to all of yall, every issue I've had with my Jeep Cherokee over the past few years I've managed to fix on my own with all yalls help. and I am now part of the cool kids check this out
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post #29 of 34 Old 03-04-2015, 06:32 AM
Bulldogger274
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Question Location, location, location

I have a 2007 Grand Cherokee limited and have to change the cooling fan relay. Everything I see is for an older model. Is the fan relay in the same location under the headlight or did Jeep change it? Any help is appreciated.
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post #30 of 34 Old 03-04-2015, 12:11 PM
Mattyjm
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Quote:
Originally Posted by Mattyjm View Post
I realize I'm not actually answering your original question, BUT.....

If you already have the five blade fan on your 4.0, that means someone (aftermarket) put it there. I was having constant issues with my e-fan and did a butt load of reading on here. I went with a seven blade fan from a 97 Grand Cherokee and a Torqflo clutch from AZ. I normally don't shop at AZ for my WJ, but after getting some good opinions from this forum, I bought that clutch instead of the one from Advance Auto.

I also have a 2000 WJ in Silverstone w/black cladding....We have the same Jeep and powertrain. I installed a 180 degree thermostat which is not recommended, but I did it anyway. After installing the 7 blade fan and clutch, my WJ now constantly runs and idles at a steady 180 degrees, which is what I like. Hope this helps you!
Fixing your overheating at idle problem with The Ickster:

First, add a clutch and a seven blade metal fan from an older 4.0L i6.

Then, you get rid of anything that's NOT a clutch and fan. (i.e.....constantly failing e-fan and relay)

Then, you enjoy driving your WJ at cooler than 210 degrees, and you never overheat at idle, while mall-crawling, while highway driving....or ANY other type of driving.

Thank you. This has been Fixing with The Ickster.

I looked over there <- one day and it said "Senior Member" and I was like...."Naaawwww, I'm only 43!"
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