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Fan Relay on 2004 Grand Cherokee

Old 09-26-2016, 02:36 PM
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Default 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!
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Old 09-26-2016, 06:50 PM
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For 4.0 only:In PDC, 2 relays, location marked on cover....nothing behind headlight on 2004
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Old 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.
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Old 09-26-2016, 10:40 PM
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Originally Posted by BoSox 15 View Post
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.
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Old 09-27-2016, 07:36 AM
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Great thank you!
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Old 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.
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Old 09-27-2016, 09:41 AM
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Originally Posted by BoSox 15 View Post
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.
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Old 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?
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Old 09-28-2016, 06:24 AM
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Originally Posted by GUARDIAN View Post
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.
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Old 09-30-2018, 12:59 PM
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Last edited by powers01; 09-30-2018 at 01:03 PM. Reason: wrong thread
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Old 09-30-2018, 06:06 PM
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Old 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.
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