So I posted a while ago that my radiator was leaking due to a crack. It wasn't over heating, the fan was working and there was just a lot of radiator fluid coming out of the crack spilling a ton. I tried to do a JB Weld and it wouldn't hold after 2 failed attempts so I took it to get replaced. 2 days later I get my car back because of mishaps, they call and tell me that my car is over heating with the new radiator that it could either be the water pump, head gasket, or thermostat. (Luckily the thermostat fixed the problem) So I get my car back they tell me my fans motor is running a little weak and has a hard time kicking on that I would need to turn on the AC on high to get it to turn on sometimes. A couple days running fine no leaks its awesome. Yesterday I hit some traffic in the city for the first time and I noticed my temp gage started to shoot up the more I was stopped (moving I was fine the engine was getting air) so I turn on the AC on high and start moving again temp goes down.
Today I was curious to see if the fan would kick on so I left the car running in the drive way with the hood open, car gets to about 215 and fan still hasn’t kicked on, gets to about 230 still nothing. I decide to turn on the AC on high and see if the fan kicks on. A couple minutes of that still nothing, so I turn the car off and let it relax before I start messing around seeing if they forgot to plug something in or what it could be, especially since it was working fine before I took it there and never overheated. (It did about 3-4 months ago once when the temp was extremely high outside, had AC on high and the windows down like an idiot as I rolled windows up it was fine). I called my mechanic and the owner of the place I asked them what is going on, I yelled at them (I’m really close to my mechanic been going there for 7 years done free repairs, taken really good care of me) they told me to bring it in tomorrow morning to take a look at it and see if they forgot to plug something in.
Here is what I see: //imgur.com/a/46gAK (When you are looking at the front of the car this is to the left side of radiator, near headlight area)
I never noticed this before when I was working on it not sure what is going on. Any advice would be wonderful I have dropped a lot into my jeep the last 3 weeks and don't want to spend anymore ($700+ in misc repairs). I love my jeep but I guess it really is an acronym for Just Empty Every Pocket.
Thanks for the help in advance!
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Fan Relay on 2004 Grand Cherokee
09-26-2016, 02:36 PM
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Fan Relay on 2004 Grand Cherokee
Can someone familiar with an '04 Grand Cherokee let me know their experience with the fan relay location? I've seen differing locations online (one behind the headlight, the other in the power distribution center). From what I gather online, 2004 was around the time that the location changed. So I came here to the Cherokee Forums to see if someone has experience with this!
My question is, is there an easy way to tell? In other words, if there are high and low speed fan relays in the power distribution center, does that mean there is no PWM fan relay behind the bumper/headlight?
For the background, my GC started overheating at idle. When I drive the temperature is in the normal range, but as soon as I stop driving the gauge starts rising. The fan turns freely so I don't think the fan motor is seized up but I'd like to try the logical fixes and save a buck if possible.
Thanks in advance!
09-26-2016, 06:50 PM
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Year: 2004
Model: Grand Cherokee
Engine: 2000 4.0
For 4.0 only:In PDC, 2 relays, location marked on cover....nothing behind headlight on 2004
09-26-2016, 10:12 PM
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Thanks for that...do you have the exact name of the relay? When I look at Advance Auto or O'Reilly online and search for fan relay, it gives me the parts for the behind the headlight relay, even though I entered my vehicle info.
09-26-2016, 10:40 PM
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Year: 2004
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Quote:
Originally Posted by BoSox 15
Thanks for that...do you have the exact name of the relay? When I look at Advance Auto or O'Reilly online and search for fan relay, it gives me the parts for the behind the headlight relay, even though I entered my vehicle info.
Just unplug one of the relays (they are both the same) and take it to the parts house and let them match it up. It is just a generic relay. One relay is for low speed and the other is high speed....try switching them to see if fan comes on.
09-27-2016, 07:36 AM
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Great thank you!
09-27-2016, 09:32 AM
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Sorry for the multiple replies. I'm at work so I can't take a look until I get out but I just thought of this...
If there are two relays, do they work independently? Even if one is defective shouldn't the other (high or low) kick on either way? In other words should the fan come on if one relay is inoperative?
I'm just trying to troubleshoot what I can before I have to spend a lot of money.
09-27-2016, 09:41 AM
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Year: 2004
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Quote:
Originally Posted by BoSox 15
Sorry for the multiple replies. I'm at work so I can't take a look until I get out but I just thought of this...
If there are two relays, do they work independently? Even if one is defective shouldn't the other (high or low) kick on either way? In other words should the fan come on if one relay is inoperative?
I'm just trying to troubleshoot what I can before I have to spend a lot of money.
yes but high speed does not come until temp is above normal.
09-27-2016, 09:50 PM
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I think I saw somewhere that the high speed should also come on anytime the a/c is on. Can someone confirm that?
09-28-2016, 06:24 AM
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Quote:
Originally Posted by GUARDIAN
I think I saw somewhere that the high speed should also come on anytime the a/c is on. Can someone confirm that?
Not correct. High speed fan is controlled by pressure switch located in refrigerant line at condenser....it does not run continuously when AC is on. It cycles on/off when AC high pressure demands it.
09-30-2018, 12:59 PM
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Last edited by powers01; 09-30-2018 at 01:03 PM. Reason: wrong thread
09-30-2018, 06:06 PM
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10-05-2018, 08:40 PM
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I had this issue with the relays, I went to a mechanical fan off a Ford explorer, but it has to be the eleven blade fan so it fits into your fan shroud. It was a 4.0 liter ford explorer between 1998 and 2004. My Cherokee has ran at least 8 to 10 degrees cooler ever since.
01-28-2021, 11:34 PM
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Model: Cherokee (XJ)
91 engine into an 89 xj
Anyone ever swap a 91 4.0 into an 89 xj? I�ve been researching. Info is a little all over the place. Can�t find this specific swap. Missing it by a year or two. Looking for a write up. Or what changes need to made.
Maybe their a direct swap?
Thanks.
07-11-2021, 05:04 PM
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Year: 1996
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Engine: 4.0 from a 94 grand cherokee
dont know where to ask this so im trying here, i tried a new thread and that got nothing but related to this thread so here goes:
I have a 2 door 96 XJ body with the engine bottom from a 97 XJ and the head from a 94 grand cherokee. Everything seemed to be working fine until the water pump went out on the freeway and by the time I noticed it over heating it was at 302 degrees F and started to loose power fast. I cut it off and coated to the side and with the help of some strangers got it off the freeway to safely in a parking lot then AAA got her home to assses the damages. what i found was #2 piston melted a hole down one side. besides a lot of burnt up oil baked on everything, all else seems to be ok. My 94 short block had #1 piston skirt and connecting rod break down and blew a hole out the side of the block and the pan but I still have the everything else which is why I used the head on the cheep 97 short block I got off of craigslist. My question is can I use a good piston from my 94 grand cherokee in my 97 XJ short block?
07-11-2021, 07:14 PM
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No, your question is NOT related to this thread. Not even A LITTLE BIT.
As your question in the proper forum and have a little patience.
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