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electric aux fan help

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Old Jan 23, 2012 | 03:14 PM
  #1  
shaner517's Avatar
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From: Lakeland
Year: 1996
Model: Cherokee
Engine: I6 4.0
Default electric aux fan help

My electric fan in my 1996 ch sport does not turn on causing excessive heat. I do know the fan works I hooked it up to a power source. I think its a wiring problem but im not sure Idk want to I want too follow the wires all the way. Would it be a bad idea to run it directly to the fuse box and put a manual switch in?
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Old Jan 23, 2012 | 03:28 PM
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From: Visalia, Kalifornia, ussa
Year: 1996
Model: Cherokee
Engine: 4.0
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bad temp sensor or relay.
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Old Jan 23, 2012 | 03:35 PM
  #3  
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From: Lakeland
Year: 1996
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Engine: I6 4.0
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Thanks. Sounds a lot simpler haha
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Old Jan 23, 2012 | 04:37 PM
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From: The Republic of TEXAS
Year: 1998
Model: Cherokee
Engine: 4.0L HO
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One thing to keep in mind, standard factory cooling did not have an efan so if overheating occured, it was due to something else (clogged rad, bad fan clutch, t-stat, water pump, etc.)....not the efan not running. This time of year (cool ambient temps) and for several months we'll never hear our efan (unless the a/c compressor is engaged) because the main fan is sufficient especially during cool/cold weather.
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Old Jan 23, 2012 | 04:40 PM
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From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
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Originally Posted by djb383
One thing to keep in mind, standard factory cooling did not have an efan so if overheating occured, it was due to something else (clogged rad, bad fan clutch, t-stat, water pump, etc.)....not the efan not running. This time of year (cool ambient temps) and for several months we'll never hear our efan (unless the a/c compressor is engaged) because the main fan is sufficient especially during cool/cold weather.
x2^^^^
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Old Jan 23, 2012 | 04:43 PM
  #6  
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From: The Republic of TEXAS
Year: 1998
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Engine: 4.0L HO
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Also, I'll add to the list "missing fan shroud".
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Old Jan 24, 2012 | 12:04 PM
  #7  
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From: Lakeland
Year: 1996
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Well in here in Florida its staying pretty hot and its causing my injectors to get hot and miss fire when I turn the vehicle off then on and my temp gauge never goes above 210
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Old Jan 24, 2012 | 12:26 PM
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From: The Republic of TEXAS
Year: 1998
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How do u know it's an injector problem caused by overheating? The efan "on temp" is 218F so if u r running 210 or less, fan won't be on (unless the a/c compressor is on).
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Old Jan 24, 2012 | 12:39 PM
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From: Lakeland
Year: 1996
Model: Cherokee
Engine: I6 4.0
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Every time it starts to misfire I turn it off poor water over the fuel line just before the injectors and a little on them. Then it'll start up fine
otherwise I have to wait 20-30 min to cool
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