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Old 11-02-2006, 07:43 AM   #1
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Default manual fan switch, stupid question

Ok i decided to install a manual fan switch in my 97 t/a, but i'm having a problem finding a good place to run the wire from the engine bay to the inside kick panel (if that's what it's called).. if i run it up top under the window lining it's almost exposed to the elements and i can't find a way to run the wire without the door hitting it (running it into the fuse box)

Sorry for the stupid question
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Old 11-02-2006, 07:51 AM   #2
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Are you making your own switch? This is the best way, IMO. Route the wiring this way.
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Old 11-02-2006, 08:22 AM   #3
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thanks, just what i needed

i have it routed on the driver's side right now, ill move it later on.

edit: i have my line running straight from the engine bay fuse box (coolant fan#1 relay) and a 12V power source inside the kickpanel with a 30A inline fuse on the hotline. Is this a bad idea?

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Old 11-02-2006, 02:23 PM   #4
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IMO, it's a bad idea. I would never want to use 12v power through a switch. Too much potential for trouble with something that uses that much current.
Using the normal fan relay control wires gives you override on the fans and still lets them work as normal, without any trouble codes. Your way is going to set a trouble code when the computer sees the fans on when it has not told them to be on. The wiring diagram on my site will not cause any trouble codes.
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Old 11-02-2006, 04:09 PM   #5
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Not to be a rotten apple, but I never saw the purpose for this mod unless you are running an electric pump as well and can cool the motor while it is not running. If the computer is reflashed to have the fans come on at lower temps to work in conjunction with a cooler thermostat, there is really no reason that I see, to have a manual override switch.
Is there something I am missing here? Someone please enlighten me. Larry.
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Old 11-02-2006, 04:52 PM   #6
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Quote:
Originally Posted by Firebirdjones View Post
Not to be a rotten apple, but I never saw the purpose for this mod unless you are running an electric pump as well and can cool the motor while it is not running. If the computer is reflashed to have the fans come on at lower temps to work in conjunction with a cooler thermostat, there is really no reason that I see, to have a manual override switch.
Is there something I am missing here? Someone please enlighten me. Larry.
no your not being rotten. when you hard wire the fans through the fan relay they still work as advertised. but lets say you put in a 160 degree stat and just have free mods on your car. you cant just yet justify a dyno tune because of what you your next mod will be. say h/c. no need to tune it twice right. so put it in to make use of your 160 stat right now and pick up some more power. or say you are taking it to the track on a hot azz day and you have 30 minutes between runs click the fan on while the car is sitting there to help cool things down as much as possible. to some people its a fail safe. if that switch is on then its one less thing to worry about. or atleast these are my thoughts on it.
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Old 11-02-2006, 04:59 PM   #7
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I need to rewire mine this way, when I first got the car we had to by pass the PCM all together because the PCM was messed up and wouldn't turn on the fans. Now that I have a new PCM, I'm getting real tired of keeping up with the temps.
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Old 11-02-2006, 11:02 PM   #8
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Quote:
Originally Posted by Firebirdjones View Post
Not to be a rotten apple, but I never saw the purpose for this mod unless you are running an electric pump as well and can cool the motor while it is not running. If the computer is reflashed to have the fans come on at lower temps to work in conjunction with a cooler thermostat, there is really no reason that I see, to have a manual override switch.
Is there something I am missing here? Someone please enlighten me. Larry.

well for me....for some reason my fans do not come on. my engine just heats up and doesnt cool off until i hit the switch or quickly go to highway speeds, so for me its preaty essential, it being my daily driver.
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