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Old 09-11-2013, 11:03 PM   #1
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Default Cooling Fan Question - Runs

My Electic Cooling Fans runs 24/7

From start up to shut off, it is always on


Is it suppose to be running all the time?

Tks
Will
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Old 09-11-2013, 11:06 PM   #2
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Someone probably made it do that.
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Old 09-11-2013, 11:25 PM   #3
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Quote:
Originally Posted by Turbo X_J View Post
Someone probably made it do that.
Could that be running my battery down

Tks
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Old 09-11-2013, 11:27 PM   #4
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Not if you turn your key off.
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Old 09-11-2013, 11:42 PM   #5
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You might get your codes read at a parts place for free. I think by 99 it's tied into even more stuff than our pre 91's. (for us it comes on with the AC, or defrost, or when the temp passes 218*).

Just finding and changing it's relay might be cheap and easy for starters. Agreeing with turbo, look for "hacked" wiring. (or a jumper at the relay)
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If you can't find the time/computer to fill out your info, I may well not have the time to ask what you have.
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Old 09-11-2013, 11:50 PM   #6
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Quote:
Originally Posted by DFlintstone View Post
You might get your codes read at a parts place for free. I think by 99 it's tied into even more stuff than our pre 91's. (for us it comes on with the AC, or defrost, or when the temp passes 218*).

Just finding and changing it's relay might be cheap and easy for starters. Agreeing with turbo, look for "hacked" wiring. (or a jumper at the relay)
Any idea where the relay is

Tks
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Old 09-11-2013, 11:53 PM   #7
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Noisy, ain't it?

You could just wire a switch up to it for a quick fix. Also, it may sound stupid, but your a/c isn't on all the time is it?
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Old 09-12-2013, 12:05 AM   #8
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Quote:
Originally Posted by PocketsEmpty View Post
Noisy, ain't it?

You could just wire a switch up to it for a quick fix. Also, it may sound stupid, but your a/c isn't on all the time is it?
No, almost never run it

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Old 09-12-2013, 01:12 AM   #9
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Quote:
Originally Posted by Willfulone View Post
Any idea where the relay is
Sorry, no. Oddly on our earlier it's all alone midway on the inner fender.

Idk why Google advance search is not their "default". Guess they think we are too stupid!


http://www.google.com/advanced_search?hl=en

OK, look here> https://www.google.com/search?hl=en&...pe=&as_rights=
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87-90 Renix jeep owners. This is a link to great info! http://www.cherokeeforum.com/f23/tes...itings-136452/
The book's wrong! #1 is at 5:00, viewed from the side. 153624 clockwise.
I RECOMMEND 280 155 746 INJECTORS, FOR YOUR 87-90 JEEP. 4 holes are better than one, and they won't leak out the middle, like originals CAN.
If you can't find the time/computer to fill out your info, I may well not have the time to ask what you have.

Last edited by DFlintstone; 09-12-2013 at 03:38 PM.
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Old 09-12-2013, 06:15 AM   #10
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If/when you remove the cover from the Power Distribution Center (PDC) you'll see the layout and identification of the relays in the PDC. The radiator electric fan relay will be shown.

It's a common ISO relay, available at the auto parts stores. If you want, you can pull the fan relay and swap in the fuel pump relay, turn the key to RUN, and see if the fan does not run anymore. If so, replace the original fan relay and put the fuel pump relay back where it belongs.

If the fan continues to run with the fuel pump relay in the fan slot, there's a problem in the fan relay control circuit that will need to be addressed.

Let us know how you make out.
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Last edited by CCKen; 09-12-2013 at 09:18 AM.
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Old 09-12-2013, 09:06 AM   #11
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Quote:
Originally Posted by CCKen View Post
If/when you remove the cover from the Power Distribution Center (PDC) you'll see the layout and identification of the relays in the PDC. The radiator electric fan relay will be shown.

It's a common ISO relay, available at the auto parts stores. If you want, you can pull the fan replay and swap in the fuel pump relay, turn the key to RUN, and see if the fan does not run anymore. If so, replace the original fan relay and put the fuel pump relay back where it belongs.

If the fan continues to run with the fuel pump relay in the fan slot, there's a problem in the fan relay control circuit that will need to be addressed.

Let us know how you make out.
Tks, will do

Will
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Old 10-10-2013, 12:33 PM   #12
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Will Me Fan always on -even w/ key off. I am looking for the other fan relay s'posed to be under driver headlight. cannot get to it even with head light out.. looks like you have to take part of fender off,part of grill out and inner wheel well guard. pain in ***,, If I cannot spot the lol sob real soon-going back together and to mechanics,, yikes !! FOR NOW YOU CAN DISCONNECT FAN RIGHT UNDER PASS SIDE RAIATOR HOSE.. good luck
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Old 10-10-2013, 05:23 PM   #13
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Anybody want to guess what Jeep he's talking about? Alex, I'll say "what is a 2000-2001 Jeep"

Jame, with your info filled out you might try the "ask a question thread" to find your relay. In the meantime jiggle and inspect your wiring....might be there is a wire from that relay that will activate it if it's grounded. If it stops when you move some wires, maybe something chaffed and grounded.
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87-90 Renix jeep owners. This is a link to great info! http://www.cherokeeforum.com/f23/tes...itings-136452/
The book's wrong! #1 is at 5:00, viewed from the side. 153624 clockwise.
I RECOMMEND 280 155 746 INJECTORS, FOR YOUR 87-90 JEEP. 4 holes are better than one, and they won't leak out the middle, like originals CAN.
If you can't find the time/computer to fill out your info, I may well not have the time to ask what you have.
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Old 10-11-2013, 10:51 AM   #14
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Default FAN ALWAYS ON

fOUND FAN RELAY- BEHIND PASS SIDE HEADLIGHT.. UNPLUGGED AND FAN STILL ON.. NEVER GOT A CLEAN READIING ON TEMP CONTROL SWITCH..i SUSPECY WIRING DEFECTIVE. .YES I SWAPPED OUT RELAYS IN CONTROL POWER CENTER .. '99 4.0 JAMES MINE GOING TO SHOP NEXT WEEK..
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Old 10-11-2013, 02:38 PM   #15
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Most likely there is a temp switch somewhere that is defective. Find and replace it, your problem should be solved.
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