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Discussion Starter #1
I've read about people hard wiring the fan so it remains on all the time, but are there fan switches that have lower temperature ratings?
 

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I'm not sure about a coolant temperature sensor that kicks the fan on earlier - but I know that if it's running too hot it most likely has nothing to do with the fan.

If you just want the fan to come on earlier because you're paranoid about the engine overheating - wire in a toggle switch or button and turn it on yourself when you think it should be on... I find that the fan on my car doesn't come on too often because I do more moving than stopping.

Mike
 

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Adding to what 89DodgeSpirit said, if you hook up a fan switch, make sure you hook it up passive style. Just run a ground wire to your switch then to the ground side of your fan relay... Voila!
This method will allow the computer to still control the fan if you forget to turn on the switch. Thats how I have mine hooked up, I've heard horror stories about guys controlling their fan the other way and forgetting to turn it on and they overheated.

Jesse
 

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Discussion Starter #4
"Just run a ground wire to your switch then to the ground side of your fan relay... Voila!"

Good advice! I wanted to set this up for quarter mile drags to assist in cooling. Thanks for the advice. :)
 

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heres a question.... on my saturn if you turned the ac on it would turn the fan on an when i removed the ac system i put a jumper in this one plug for the ac system and then whenever i turned my ac on (which wasnt there) it would just make the fan come on..... are tds set up simmilarly (where if turn the ac on the fan comes on??) and if either you took the ac system out (like me) or it isnt there but for some reason you still have the button for it is there a thing that can be jumpered to make the fan come on??
 

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ke6960 said:
heres a question.... on my saturn if you turned the ac on it would turn the fan on an when i removed the ac system i put a jumper in this one plug for the ac system and then whenever i turned my ac on (which wasnt there) it would just make the fan come on..... are tds set up simmilarly (where if turn the ac on the fan comes on??) and if either you took the ac system out (like me) or it isnt there but for some reason you still have the button for it is there a thing that can be jumpered to make the fan come on??
Great thought. I won't take my A/C system out living in Florida but for someone to try this try jumping the plug on the high side switch at the condensor.
Tim
 

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Yes, many have done this, jumping the A/C pressure switch near the map sensor will cause the fan to come on manually but operate VIA the computer when turned off.
 

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Hello. I decided to wire up a manual fan switch for my car and I have one question about the switch itself. It has two prongs; Accessory and Ground. I know I'm suppose to wire it up 'passively' so that when the switch is off the computer can still control the fan and I need to connect a wire to the fan relay ground (blue) wire. Does that wire go to the ground prong on the switch or to the accessory prong, then another wire go from the ground prong to a body ground? Or just one wire from fan relay ground to ground on switch and it's done? Thanks!
 

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Since you live in Florida like me why don't you just ground out the relay and have the fan on all the time. That's what I did and it works great.
 

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WestonM22CSX said:
Hello. I decided to wire up a manual fan switch for my car and I have one question about the switch itself. It has two prongs; Accessory and Ground. I know I'm suppose to wire it up 'passively' so that when the switch is off the computer can still control the fan and I need to connect a wire to the fan relay ground (blue) wire. Does that wire go to the ground prong on the switch or to the accessory prong, then another wire go from the ground prong to a body ground? Or just one wire from fan relay ground to ground on switch and it's done? Thanks!
Connect a wire inline to the blue wire with a pink tracer off the fan relay. Run that wire throught the firewall and connect it to the accessory prong. Connect a second wire from the ground prong of the switch to the body.
 

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I just wired my manual fan switch.

I had a 12v going to a switch, then that same 12v goes to adjustable thermostat and to the fan. I also have a switch light telling me if the fan is on

So, I can leave the switch on and not have to worry about my battery being drain because the fan will only be on if the temperature is above certian degree.
 

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Hey. I realized what I thought was the ground prong on the switch actually says Battery (+). Will it work the same as the ground prong cause that is the way I wired it. I also made a big mistake wiring it up this morning. I thought the lone blue wire with its own connector going to the fender side of the relay was the ground and connected the fan switch with that wire. Good thing I had the inline fuse too or it may have caused damage. Instead it blew the fuse. I tried two to make sure and they both blew so I have to do some re-wiring. What caused me to notice my mess-up is after wiring it all up I took some pics. Came inside and looked at the engine shot and saw a blue wire nestled in with the larger connector and the pink tracer as was mentioned earlier in this thread. Should've read it more carefully and actually remembered it :bash:
 
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