Rebuilding mine 02 Liberty the was wrecked in the front. We supplied all new parts native an 05. Mine 02 has a 2 cable plug to the electric fan, the 05 has actually a 3 cable plug. So, we reduced off the 3 wire plug and put the old female next of the 2 cable plug ~ above the fan and connected it come the High rate side, then then the short speed, climate both together. NOTHING. My temp gauge inside will certainly not move past 1 needle mark before half. It was 82 levels yesterday i let it sit at idle for 1hr and the electric fan would certainly still no kick on. Ns OHM experiment the coolant sensor through the alternator and also it appears to be working fine.Possibly relay under the battery box? If ns unplug the coolant sensor the pan kicks on prefer it should. Exactly how do you check the relay? ns still running the mechanical pan so probably the coolant is just not reaching the exactly temp to kick on the fan. BUT, it was hot yesterday, i strongly feel there is a trouble somehwere. Is there any type of other means to trick the mechanism into turning the pan on? ns at a loss.


You are watching: 2003 jeep liberty radiator fan control relay circuit

*

The e-rad fan only comes top top at certain conditions.OPERATIONThe electric radiator cooling pan is managed by the Powertrain manage Module (PCM) v the radiator cooling pan relay. The PCM regulates pan operation based upon input indigenous the engine coolant temperature sensor, battery temperature sensor,airconditioning select switch and also vehicle speed. The fan is no energized throughout engine cranking nevertheless of the electric input indigenous the temperature sensors and also ,air air conditioning switch. However, if engine operation problems warrant fan engagement, the fan will certainly run once engine starts.Vehicles Equipped v AC:In enhancement to making use of coolant temperature and also battery temperature sensor to regulate cooling fan operation, the cooling fan will additionally be involved when the ,air conditioning system is activated. The relay is likewise energized when, air conditioning is selected and also coolant temperature is over 95° C ( 203° F), or , air conditioning is selected and also battery temperature sensor is over 41° C (106°F). It will certainly then de-energize when , air conditioning is selected and also coolant temperature is listed below 92° C (198° F), or , air air conditioning is selected and also battery temperature is listed below 38° C (100° F).Did you check the fuse to the radiator pan relay?
R
renegade 04Full accessibility Member
JoinedJan 3, 2014Messages1,466Reaction score15LocationAlbany brand-new York
Yes, you deserve to trick the jeep so that you deserve to activate the cooling fan. Ns did and also it was a cool mod and also it would simple for you due to the fact that you have only one speed however you can make it work with both high and low.
K
KarausNew Member
JoinedMay 5, 2015Messages8Reaction score0LocationIndiana
Vehicles Equipped with AC:In enhancement to making use of coolant temperature and battery temperature sensor to regulate cooling fan operation, the cooling fan will additionally be involved when the ,air conditioning mechanism is activated. The relay is also energized when, air conditioning is selected and also coolant temperature is above 95° C ( 203° F), or , air air conditioning is selected and battery temperature sensor is over 41° C (106°F). It will certainly then de-energize once , air conditioning is selected and also coolant temperature is listed below 92° C (198° F), or , air air conditioning is selected and also battery temperature is listed below 38° C (100° F).Did you inspect the fuse to the radiator fan relay?My fan does not come on once i revolve the ac on. Im still rebuilding the jeep for this reason it no have any coolant in the ac lines. It additionally has the newer layout 3 wire pan on the while mine jeep is the old 2 wire so ns was led to believe thats why the pan does no come on as soon as i turn the ac on. True? additionally the fuse is good. Ive swapped and replaced the fuse many times. The only means ive been able to get the pan to absent on is unplugging the coolant sensor and providing power right from the battery. Have the right to you test the relay anyway? After reading the ohms of the coolant sensor it appears to be functioning fine.It satellite at idle for approximately 1hour in ~ 82 degrees F outside yesterday. Certain at the temp the coolant and battery temp would be approximately par for it to kick on. My temp gauge ~ above the cluster will not move over half.Possibility that it just not obtaining hot enough? appears unlikely.
Last edited: may 5, 2015
*

uss2defiantFull accessibility Member
JoinedJun 25, 2014Messages3,524Reaction score113LocationTucson, Arizona


See more: 2004 Chevy Malibu Anti Theft Reset The Anti Theft System?? How To Disable Or Reset The Anti Theft System

False, i think that shouldn"t matter if you have actually a 2 speed (3 wires) matches a solitary speed pan (2 wires).Without AC, the fan should still which regardless when it gets hot enough.If I read my 03 FSM correctly, to test whether the relay is still functioning mechanically, you can use at +12V bias to pen 4 which is the manage line that the relay. Ns would execute this unplugged indigenous the car. For this reason by using +12V on pin 4 with pin 3 as ground, pin 1 and also pin 3 will be associated (use conductivity test here).On a side note, perform you have a clutch fan? If so you"re still it s okay with simply that.If the temperature gauge is not at half, not sure whether it got to operating temperature. That would be weird if the wasn"t if girlfriend were just idling it because that an hour. :shrug: