Fan switch mod
I know this has been covered 10000x but I wanna wire a switch to run my EFAN on command, then when it's switched off, it runs like stock. Whats the easiest way to do this? Will have I have to have my key on the ACC position? What all do I need to buy?
Seasoned Member
Joined: Jan 2011
Posts: 253
Likes: 0
From: Southend-on-Sea, Essex, England
Year: 1995
Model: Cherokee
Engine: 4.0
tap into the wires going to the temperature sender that triggers the fan. depending on the year of your XJ, its either in the radiator or on the thermostat housing. mines a Renix so it was in the radiator, all i did was run one of each of the wires to a switch on the dash. turning it on basically bypasses the temperature switch and turns on the fan relay. turning it off puts it back through the factory sender
Seasoned Member
Joined: Sep 2008
Posts: 324
Likes: 2
From: Iowa
Year: 2000
Model: Cherokee
Engine: 4.0
Originally Posted by CheapCherokee
tap into the wires going to the temperature sender that triggers the fan. depending on the year of your XJ, its either in the radiator or on the thermostat housing. mines a Renix so it was in the radiator, all i did was run one of each of the wires to a switch on the dash. turning it on basically bypasses the temperature switch and turns on the fan relay. turning it off puts it back through the factory sender
CF Veteran
Joined: Oct 2009
Posts: 4,529
Likes: 1
From: somewhere Gee oh Dee cant find me...
Year: 1995
Model: Cherokee
Engine: I6 4.0L
https://www.cherokeeforum.com/f51/ho...lec-fan-48541/
that should help with pics
that should help with pics
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just tap into the blue wire with pink stripe going in the pcm(don't cut wire), just remove some of the sheathing and solder in a new piece of wire. Then run that wire into the interior to your desired switch location and wire to one side of your switch and ground the other side of the switch to a good ground location in the interior. That's it, I did it on mine and it works perfectly.
CF Veteran
Joined: Mar 2011
Posts: 1,751
Likes: 3
From: Tampa Fl
Year: 1997
Model: Cherokee
Engine: 4.0 HO
Originally Posted by rmaytee
Does anyone have a write-up for wiring the fan to always run as long as the key is on? I don't want to have to think about turning it on, I just want it on.
CF Veteran
Joined: Apr 2011
Posts: 14,553
Likes: 1
From: Carrollton, GA
Year: 1994
Model: Cherokee
Engine: Inline 6 4.0L High Output
CF Veteran

Joined: Jul 2012
Posts: 1,185
Likes: 5
From: Pahrump, NV
Year: 1996
Model: Cherokee
Engine: 4.0L
Originally Posted by Jeepjunky
https://www.cherokeeforum.com/f51/ho...lec-fan-48541/
that should help with pics
that should help with pics


