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07-31-2008, 08:23 PM
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#1
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dakuda is a god
Join Date: Jun 2006
Location: Battle Creek MI / Lima OH
Posts: 4,587
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Electric fan override switch
Ok, i made a thread about this a LONG time ago but i cant find it and i never got around to doing it.
I know i could just put it on the switch but i would forget to turn it on. So i want it to come on like normal AND have a switch so i can leave it on when the engine is off. I know there was a place making a harness with the relay and everything for this. i cant remember the name though. I think they might have went out of bussiness anyways. Anyone know anywhere that sells a kit or anything?
If not then does anyone have a wiring diagram or some instructions on how to make my own. Im not wiring expert but i might be willing to give it a shot if i cant get a premade one...
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07-31-2008, 09:12 PM
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#2
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Registered User
Join Date: Sep 2007
Posts: 1,633
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The cooling fan draws at least 40 amps, If you let it run when the engine is off it will kill the battery in no time if you don't go back and turn it off. Hood vent might be a better idea. my.2
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07-31-2008, 09:24 PM
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#3
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Registered User
Join Date: Sep 2006
Location: Long Island, NY
Posts: 3,571
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whatever writeup is in the sticky is what i followed, and my fan comes on normally and when i hit the switch.
__________________
Factory Four Link
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08-01-2008, 01:36 AM
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#4
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Registered User
Join Date: Oct 2007
Location: flagstaff, az
Posts: 1,104
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run a lead from the + terminal to a fuse, switch in the cab, splice to the power lead on the fan, ground the other (don't think you actually need to since it is factory grounded). i've done this and it works great. fan still comes on for overheats, and i can have it on full time for 4 wheeling.
__________________
'93 4X4
AX-15
NP-231
2" LIFT
BFG A/T'S
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08-01-2008, 01:52 AM
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#5
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Registered User
Join Date: Aug 2007
Location: bethlehem pa
Posts: 378
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Quote:
Originally Posted by XJLI
whatever writeup is in the sticky is what i followed, and my fan comes on normally and when i hit the switch.
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is this the one you followed?
http://www.projectxj.com/mods/stocker/fan.switch.htm
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08-01-2008, 11:24 AM
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#6
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Registered User
Join Date: Nov 2007
Location: California
Posts: 949
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Just buy a cheap off-delay timer relay on ebay, and stick it in the control for the fan relay?
--Bushytails
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08-01-2008, 12:54 PM
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#7
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Registered User
Join Date: Sep 2006
Location: Long Island, NY
Posts: 3,571
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Quote:
Originally Posted by 1988XJ
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yup .
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Factory Four Link
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08-01-2008, 05:00 PM
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#8
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Registered User
Join Date: Jul 2008
Location: England
Posts: 48
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Duplicated see next entry.
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08-01-2008, 05:04 PM
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#9
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Registered User
Join Date: Jul 2008
Location: England
Posts: 48
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Have just done this one last week. I was told to wire in a swiched earth to the fan relay. The PCM sends an earth to the relay to start the fan you are just doing the same thing. Check the pins on the relay with a test bulb to rule out the positve pins. A simple test wire from the earth battery terminal will tell you that you have got the right one. My relay was in the fuse box on the right hand inner wing. If I pull the relay out whilst leaning over the wing I believe it was the terminal at the 9 oclock position. If you want to make a neat job unclip the fuse box so you can see the wires underneath the relay and connect to the relavant wire. Find a nice earth run the two wires to the dash and connect using a flick swich. My one goes off with the ignition so no chance of leaving it on. Its great when towing and you want having an extra blast when a steep hill comes up.
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08-01-2008, 07:02 PM
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#10
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dakuda is a god
Join Date: Jun 2006
Location: Battle Creek MI / Lima OH
Posts: 4,587
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ill be trying the project xj.com write up tomarrow. I have to wire a bunch of crap too.
lockers, pump, offroad lights, back up lights, and fan. That still leaves me with one open spot on my panel. I need to find something else to wire into it...
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08-01-2008, 08:06 PM
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#11
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Registered User
Join Date: Aug 2007
Location: bethlehem pa
Posts: 378
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does the project xj.com link work for an 88 cooling system?
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08-01-2008, 10:22 PM
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#13
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Registered User
Join Date: Sep 2006
Location: Long Island, NY
Posts: 3,571
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you really should have a relay if you do it.
__________________
Factory Four Link
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08-01-2008, 11:22 PM
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#14
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Registered User
Join Date: Jan 2008
Location: West Rushville OH
Posts: 266
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for the 88 cooling system i just tapped in the existing fan relay...and placed an inline fuse with it to... works like normal
__________________
1995 Cherokee: HO 4.0L/auto/4x4, 3.5 custom lift, 31/10.5/r15s treadwrights.
1985 CJ-7 3in shackle lift bald 31's more rust than anything
92 YJ stockish
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08-02-2008, 09:51 AM
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#15
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Registered User
Join Date: Jul 2008
Location: England
Posts: 48
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Quote:
Originally Posted by ruff87xj
for the 88 cooling system i just tapped in the existing fan relay...and placed an inline fuse with it to... works like normal
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Yep this is the method I used. 1 switch and a few feet of wire!
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Electric fan override switch
