post #1 of Old 01-25-2014, 06:31 AM Thread Starter
Jeep98_zj
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1998 ZJ 
 
Join Date: Aug 2010
Location: FlorAbama
Posts: 41
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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post #2 of Old 01-25-2014, 06:43 AM
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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post #3 of Old 01-25-2014, 03:13 PM
jeepjeepster
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They be the exact same. Upper and lower sensors that is.

1994 ZJ-I6 w/216,000 mi
1998 ZJ 5.9 w/65,155 mi Slate Black
2004 KJ w/90,300 mi
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post #4 of Old 01-26-2014, 01:38 AM
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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post #5 of Old 01-26-2014, 06:47 AM Thread Starter
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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post #6 of Old 01-26-2014, 08:11 AM
50notch
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The low speed kicks on at 213* and the high speed kicks on at 220*

1998 Grand Cherokee 5.9 - DT headers, Kolak 3" exhaust, 2" BB, K&N CAI
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