electric fan mod using headlight timer
Thread Starter
Senior Member
Joined: Aug 2009
Posts: 914
Likes: 14
From: north carolina
Year: 2000
Model: Cherokee
Engine: 4.0
I'm going to do the electric fan override switch. I've found the write up on it, but I read somewhere that there is a way to wire the fan so that when you turn the XJ off the e-fan will continue to run using the same timer/relay that the headlight uses. This way it will run for a minute or so and then turn off. Has anyone seen a write up on this? thanks
CF Veteran
Joined: Jun 2011
Posts: 2,460
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From: Dayton, Ohio
Year: 1992
Model: Comanche
Engine: 4.0
I'm going to do the electric fan override switch. I've found the write up on it, but I read somewhere that there is a way to wire the fan so that when you turn the XJ off the e-fan will continue to run using the same timer/relay that the headlight uses. This way it will run for a minute or so and then turn off. Has anyone seen a write up on this? thanks
Ive seen it and know what youre talking about,,have you check the DIY'ers section?
CF Veteran
Joined: Aug 2010
Posts: 8,387
Likes: 1
From: The Florida State University
Year: 2001
Model: Cherokee
Engine: I-6 4.0 L
Just did some basic research. Here's the link to the delay timer, the forum I found it on (it was used on HIDs on a crotch rocket).
Delay:
Forum: http://www.buellxb.com/Buell-XB-Foru...nons-installed (scroll down)
Delay:
Forum: http://www.buellxb.com/Buell-XB-Foru...nons-installed (scroll down)
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CF Veteran
Joined: Feb 2011
Posts: 3,500
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From: Long Beach, Ca
Year: 2000
Model: Cherokee
Engine: 4.0 I6
Here ya go. I think I'm actually going to attempt this, hopefully before summer.
http://hotronicsproducts.com/product...9#.UWHoBBrCszE
http://hotronicsproducts.com/product...9#.UWHoBBrCszE
Last edited by askingxforxit; Apr 7, 2013 at 04:42 PM.
Thread Starter
Senior Member
Joined: Aug 2009
Posts: 914
Likes: 14
From: north carolina
Year: 2000
Model: Cherokee
Engine: 4.0
I found a write up on another forum, and this is what the guy used. There is a write up in the DIY section on the e-fan switch, but not with the timer. It can't be too much trouble to add the timer. I have a 2000 XJ and it gets heat soak alot, even when the temps are in the '70's. That hotronics timer seems a little pricey when you compare to this timer board.
http://www.at-fairfax.com/search-res...-960&submit=Go
http://www.at-fairfax.com/search-res...-960&submit=Go
Last edited by mikesignal; Apr 7, 2013 at 11:43 PM.
Seasoned Member
Joined: May 2010
Posts: 320
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From: Dillsburg, PA
Year: 2000
Model: Cherokee
Engine: I6
http://www.naxja.org/forum/showthread.php?t=1004656. Guys in that thread used the same timer/controller. This mod is on my list also.
Thread Starter
Senior Member
Joined: Aug 2009
Posts: 914
Likes: 14
From: north carolina
Year: 2000
Model: Cherokee
Engine: 4.0
I ordered the timer through Jmac supply. It was about $37.00 with shipping. I'm hoping to get it before next weekend.
http://www.jmacsupply.com/Elk_ELK_96...elay-timer.htm
on a side note i replaced my water pump and thermostat, as well as flushed out the system. The original water pump looked fine, but I had a new one on hand so I put it in. My coolant looked like garbage also. Since then the heat soak has not happened, although I've only driven it 3 times and the temps are around 80. Before the water pump/thermostat/coolant change it would heat soak when the temps were as low as 50. I guess the engine was running hot even though the temperature gauge said 210.
I've really neglected the jeep over the last 6 or 7 years. It usually just sits in the parking lot at work for weeks at a time because I drive a company vehicle. I'll start it up and run it for a few minutes, that's it. I've averaged under 2k miles a year on it the last 7 years. I had to buy new tires last year because the old ones literally rotted apart sitting in the parking lot.
http://www.jmacsupply.com/Elk_ELK_96...elay-timer.htm
on a side note i replaced my water pump and thermostat, as well as flushed out the system. The original water pump looked fine, but I had a new one on hand so I put it in. My coolant looked like garbage also. Since then the heat soak has not happened, although I've only driven it 3 times and the temps are around 80. Before the water pump/thermostat/coolant change it would heat soak when the temps were as low as 50. I guess the engine was running hot even though the temperature gauge said 210.
I've really neglected the jeep over the last 6 or 7 years. It usually just sits in the parking lot at work for weeks at a time because I drive a company vehicle. I'll start it up and run it for a few minutes, that's it. I've averaged under 2k miles a year on it the last 7 years. I had to buy new tires last year because the old ones literally rotted apart sitting in the parking lot.
Thread Starter
Senior Member
Joined: Aug 2009
Posts: 914
Likes: 14
From: north carolina
Year: 2000
Model: Cherokee
Engine: 4.0
my timer shipped out today, so i should get it by the end of the week, and I also picked up a temperature gauge off ebay. I plan on putting the temperature gauge probe in the engine compartment to check the temperature with and without the fan on. I think it will work.
http://www.ebay.com/itm/1-6-New-Universal-Water-Transmission-Temperature-Gauge-/380115929545?pt=Motors_Car_Truck_Parts_Accessories&hash=item5880acc9c9#ht_1752wt_1170
http://www.ebay.com/itm/1-6-New-Universal-Water-Transmission-Temperature-Gauge-/380115929545?pt=Motors_Car_Truck_Parts_Accessories&hash=item5880acc9c9#ht_1752wt_1170
Thread Starter
Senior Member
Joined: Aug 2009
Posts: 914
Likes: 14
From: north carolina
Year: 2000
Model: Cherokee
Engine: 4.0
ok--just bumping the thread to give you an update. ...the timer board came in Friday. I am hoping to do this today or tomorrow. I have to get the relay and switch at rat shack, and I think I have everything else....


