Radiator Fan questions
11-09-2001, 10:31 AM
#1
New User
Thread Starter
Join Date: Aug 2001
Location: San Jose, CA, 95132
Posts: 620
Likes: 0
Received 0 Likes
on
0 Posts
Radiator Fan questions
Okay I've got an idea here and I'm wondering if it will work....
I have a '99 Civic Si and so right now my radiator fan is hooked up to the thermoswitch which is then hooked up to IGN2. My turbo timer is hooked up to IGN1 So when I turn off the ignition and the turbo timer keeps the car on, the radiator fan turns off (or will not turn on).
Is it possible to wire the thermoswitch (ECT) up to straight +12V? I was thinknig this way the fan could turn on regardless of whether the engine is on or off or whether the key is on or off, and would be purely temperature dependent.
If i remember correctly, my mom's old subaru was like this -- on hot days the fan would stay on for a little while even after taking the keys out and turning off the car.
I've been looking through my helms manual and I think I know where in the signal path i need to change the wiring, but i don't know where it's physically located in the car. Has anyone else rewired their fans to run off a different signal than IGN2? I would still like to use the thermoswitch to turn the fan on and off.
Actually, while we're on this topic, I know that some of you wired in a switch that will force the fan on when turned on, or allow the fan to run off of the thermoswitch when off. Any tips on how to do this?
thanks
-Xerxes
I have a '99 Civic Si and so right now my radiator fan is hooked up to the thermoswitch which is then hooked up to IGN2. My turbo timer is hooked up to IGN1 So when I turn off the ignition and the turbo timer keeps the car on, the radiator fan turns off (or will not turn on).
Is it possible to wire the thermoswitch (ECT) up to straight +12V? I was thinknig this way the fan could turn on regardless of whether the engine is on or off or whether the key is on or off, and would be purely temperature dependent.
If i remember correctly, my mom's old subaru was like this -- on hot days the fan would stay on for a little while even after taking the keys out and turning off the car.
I've been looking through my helms manual and I think I know where in the signal path i need to change the wiring, but i don't know where it's physically located in the car. Has anyone else rewired their fans to run off a different signal than IGN2? I would still like to use the thermoswitch to turn the fan on and off.
Actually, while we're on this topic, I know that some of you wired in a switch that will force the fan on when turned on, or allow the fan to run off of the thermoswitch when off. Any tips on how to do this?
thanks
-Xerxes
11-14-2001, 05:01 PM
#4
Honda-Tech Member
Join Date: Nov 2000
Location: San Diego, CA, USA
Posts: 462
Likes: 0
Received 0 Likes
on
0 Posts
Re: Radiator Fan questions (Xerxes)
I used to have my fan wired to a 12v ignition source so it would always come on when the car was running. However, my car never overheats so I have it back to stock. Hope that helps.
Oh and you can use a meter to test for a 12v ignition signal, there is a wire by the harness to the fan I tapped off of.
Oh and you can use a meter to test for a 12v ignition signal, there is a wire by the harness to the fan I tapped off of.
11-16-2001, 02:50 PM
#7
New User
Join Date: May 2001
Location: Chandler, AZ, USA
Posts: 82
Likes: 0
Received 0 Likes
on
0 Posts
Re: Radiator Fan questions (dustin)
Sounds like a good idea. Let me know if it works. Oh ya, I also had my fan running straight to the fuse box so it always ran when the car was on. I like your idea better.
Thread
Thread Starter
Forum
Replies
Last Post
ShinotakuX
Honda Civic / Del Sol (1992 - 2000)
7
12-14-2007 08:20 PM
AgentJam
Tech / Misc
4
07-01-2005 05:23 AM
mike93eh
Honda Civic / Del Sol (1992 - 2000)
7
03-26-2005 03:04 PM