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Unread 01-25-2014, 06:31 AM   #1
Jeep98_zj
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1998 ZJ 
 
Join Date: Aug 2010
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E Fan Sensors (5.9->5.2)

Folks:

OK...amazingly enough found a 5.9 in a JY...

I salvaged the 2 temp sensors from the bottom and top hoses.

Questions:
-What temps do each sensor activate?
-I only planned to install one to activate the low side of my fan (all I need even in SC!)...Which hose should I use?

Thanks!!

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Unread 01-25-2014, 06:43 AM   #2
newfieZJ
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upper hose activates the low speed relay which give the power to the fan . Relays are located just behind the battery on the fender
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Unread 01-25-2014, 03:13 PM   #3
jeepjeepster
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They be the exact same. Upper and lower sensors that is.
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Unread 01-26-2014, 01:38 AM   #4
newfieZJ
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Quote:
Originally Posted by jeepjeepster View Post
They be the exact same. Upper and lower sensors that is.
True , but , you want it in the upper hose especially as a single . The lower will activate the high speed only if the coolant didn't cool off in the rad enough .
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Unread 01-26-2014, 06:47 AM   #5
Jeep98_zj
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Quote:
Originally Posted by newfieZJ View Post
True , but , you want it in the upper hose especially as a single . The lower will activate the high speed only if the coolant didn't cool off in the rad enough .

THANKS! That makes perfect spence now!!
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Unread 01-26-2014, 08:11 AM   #6
50notch
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The low speed kicks on at 213* and the high speed kicks on at 220*
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