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Unread 09-22-2009, 01:47 PM   #16
WJroadwarrior
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1999 WJ 
 
Join Date: Jul 2009
Location: clemson, SC
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not trying to be a smart *** but do you do a lot of wheeling in the mud or dirt roads..
i know i searched and searched for the problem with mine and i took a hose to it on day and about 20lbs of mud and dirt came out or the coils from where it built up over all teh wheeling trips... the running temp dropped almost 20 degrees...
just a thought

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Unread 09-22-2009, 02:25 PM   #17
dougy147
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Quote:
Originally Posted by 00RedWJ View Post
I had the exact same problem. The fan was spinning but not fast enough to move air through the radiator and the car would overheat in traffic. Replaced the fan motor 2 years ago and the temp needle has never moved past dead center since. When the fan kicks on now you can feel the hot air being drawn through the radiator.

I believe these bad fan motors are drawing too much current and either frying the relays and burning up the plug that connects to the relay.
Quote:
Originally Posted by G-Wagon00 View Post
No not usally. It hasn't done that since I replaced the fan relay switch
I think what RedWJ said makes a lot of sense. The fan is probably working now, but not to it's full capacity. If you toast another fan relay, I would call this theory confirmed.

Quote:
Originally Posted by SwayzePDX89 View Post
Have we thought about pulling codes when it over heats yet? X2
Good idea, if the CEL is on. I don't know that anything of much use would come up for overheating.
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Unread 09-22-2009, 04:18 PM   #18
SwayzePDX89
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Good idea, if the CEL is on. I don't know that anything of much use would come up for overheating.[/QUOTE]

Cause that will at least give the the exact problem why your fan is not turning on...if its relays the code "P1491'' will pop up... So you can keep playing around and find the exact problem or you can make a simple mod and install a switch that gives you control of the fan rather then randomly looking down at your Temp and your WJ is overheating cause a relay went out again. I did the switch and have no issues and have posted a thread on how exactly I did it.
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Unread 09-22-2009, 04:31 PM   #19
G-Wagon00
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how do i check my codes?
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Unread 09-22-2009, 04:57 PM   #20
dougy147
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If the fan relay os the problem yes, that would help. I guess I asumed the light was not on since it wasn't mentioned. If the light is on it's probably always a good place to start.

To check codes start with the key jn the off position and cycle the key between the off and on positions 3 times. The third time your in the on position leave it there and look in the odomotmer. It will display codes and then done. You can look the codes up at wjjeeps.com
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Unread 09-22-2009, 05:03 PM   #21
SwayzePDX89
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Quote:
Originally Posted by G-Wagon00 View Post
how do i check my codes?
go out to your car and put the key in the ignition flip the key till the gauges/miles turn on. Then what you wanna do is rapidly Tun the key

''On-off-On-off-On.

Your gauge will then go from telling your miles to reading out any codes that might be effecting your car. It will say done regardless if any codes or not pop up. So keep trying till it happens "its kinda tricky the first try." but if the code "P1491" then you know its not your fan its just the relay
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Unread 09-22-2009, 05:09 PM   #22
G-Wagon00
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Ok i just went out and did that like 10 times and it said done everytime
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Unread 09-22-2009, 05:12 PM   #23
SwayzePDX89
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Quote:
Originally Posted by G-Wagon00 View Post
Ok i just went out and did that like 10 times and it said done everytime
So...your fan IS working?
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Unread 09-22-2009, 05:24 PM   #24
dougy147
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Have you replaced the radiator cap? When you refilled the coolant, did you use pre-mixed or mix the coolant 50/50 with water? A bad/loose cap or too rich a coolant mixture will lower the boiling point of the coolant, causing the condition you are describing, per the FSM.
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Unread 09-22-2009, 05:43 PM   #25
G-Wagon00
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i can do that next. my winsheild also likes to fog up like all the time someone said that was another sign of heater core needing to be replaced
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