jeep radiator fan !
05-24-2011, 07:22 PM
#3
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Model: Cherokee
well my radiator is going bad to begin with but my driverside fan hasnt turned on. i dont know if it should be on the whole time the jeep is running or if it turns on at a certain temp?
05-24-2011, 07:38 PM
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Year: 1996
Model: Cherokee
does it come on when you turn the AC on? if not, couple options:
1) blown fuse to the fan, verify by turning AC on and checking for lack of power at the fan plug
2) bad fan, verify same way as 1 but would HAVE power to plug
3) somehow developed a short in the wiring. check for continuity between positive side of fan plug and ground
4) solve issue that you find (bad fuse, bad relay, bad fan, short in wiring, etc...)
5) profit?
1) blown fuse to the fan, verify by turning AC on and checking for lack of power at the fan plug
2) bad fan, verify same way as 1 but would HAVE power to plug
3) somehow developed a short in the wiring. check for continuity between positive side of fan plug and ground
4) solve issue that you find (bad fuse, bad relay, bad fan, short in wiring, etc...)
5) profit?
05-24-2011, 07:49 PM
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Year: 1996
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seriously, turn the AC on. If it doesnt come on with the AC, do what I posted above. the fan ALWAYS comes on with the AC, its programmed that way
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05-25-2011, 07:24 PM
#8
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Year: 1998
Model: Cherokee
Engine: 4.0
If your ac doesn't work, the fan might not come on tho..(I know when testing my ac compressor for my oba build it won't come on with the ac on because of system pressures) If you really want fan control on demand just wire it up on a switch 
05-25-2011, 09:17 PM
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Year: 1996
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05-26-2011, 09:15 PM
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Year: 1999
Model: Cherokee
Engine: 4.0
, but it does come on after the motor warmed up.What should be the first think to check?
Sorry for the hijack OP.
This is what i just found out...
1997-2001 the e-fan is triggered by the single Coolant Temperature Sensor on the thermostat housing. The PCM controls the e-fan. 97-99 the e-fan should cycle with the A/C engaged, but maybe only with warmer outdoor temps. 00-01 only cycles the e-fan when engine temps reach 215*, A/C or not. Inspect the wires and wire plugs for the e-fan.
The A/C should cycle unless it is low on R-134a or you have other issues like a bad compressor clutch or failed pressure switches.
The Blower Motor Resistor controls the interior climate control fan. They commonly blow out and one or all of the fan speeds are lost until it is replaced. Check the wires and wire plugs for damage also.
The A/C should cycle unless it is low on R-134a or you have other issues like a bad compressor clutch or failed pressure switches.
The Blower Motor Resistor controls the interior climate control fan. They commonly blow out and one or all of the fan speeds are lost until it is replaced. Check the wires and wire plugs for damage also.
Last edited by BotakBeng; 05-26-2011 at 09:22 PM.