Ok, being that SRT-6s have forced induction, and therefore are susceptible to heat soak, is there a way to over ride the cooling fan so that you can turn it on and off manually? I think this would be a great benefit at a track. Think about it. the Intercooler Heat Exchanger is right up front along with the radiator. If you could somehow trick the fan into coming on or staying to keep the circulating coolant cool, it could easily keep the car running more consistently.

I had two Dodge SRT-4s previously, and this modification was usually the first one most people do. On that car all you had to do was tap into one wire and run it to ground with a switch. When the switch was off, the fan was controlled by the ECU as normal. When you switched it on, it completed the ground circuit it turned the fan on. It was very simple, cost about $2 and 10 minutes of time.

I was hoping there was a way to do it on the Crossfire. If you have done this, let me know. If you haven't done it, but are good with electrical schematics help me figure out how to do it.

Thanks. I'm sure this would be an easy and worthwhile freebie mod that a lot of owners could take advantage of.

 

Yes, but it involves some wiring and the installation of a switch or poteniometer in the cockpit... I run mine at full speed all the time... It's an annoying sound when idling, but seems to keep the engine cooler and directs more air into the intake set-up I have...

Look at the wiring diagram in the service manual and you can figure out how to install it...

 

Has anyone taken this approach since this thread was out there? I really would like to be able to switch back and forth from an auto mode or manual.

Steve

 

hey, this is what u can do, my module went out recently so when i was testing everything, i know the input and output wires, if u know where the module is, u can disconnect (reconnect when done) the harness and what u can do is run a wire from the thick + input (it's 12v all the time) and put it to the brown thick wire to the output.

ofcourse u can put a switch in between to cut it on and off, this wil allow u to turn it on any time u want, or let it just be on auto.

 

Thanks. Have you done with with yours? If so, did you install a switch?

Steve

 

hey no, i didn't do mine, i just pluged wires for testing purposes. shold be fairly easy to do. there's only 4 big wires there (2 input + and- and 2 ouput + and -) (dw about the lil ones, they r from the powertrain module). it's easy to spot the output wires, u'll see them going to the fan, the other 2 are input.

 

i'm actually running my radiator fan off of a switch right now. the fan control relay is busted, checked w/ mercedes and chrysler, they want to charge 600$ to replace the unit...bloody hell. anyways, i'll take a picture of my setup, its really simple. Just using an inline switch under the hood till I get an aftermarket programable fan relay off of jegs for 50$. that damn radiator coolant warning light is always going to be there though..

Best to use heavy guage wire and a high-rated switch. I'm using the same size wire as stock (6 guage str) and a 50amp switch to avoid any under-hood meltdowns. 6str is pretty big, so not available at most autozones. go to home depot, you can pick up 7ft of 6guage and a 50switch for under 20$

 

Short of tying the fan to the 12 volt source, which I do not recommend for the street, you can add a resistor across the thermal sensor to speed up the fan for racing events.

The paralleled resistors make the computer think the engine is hot so the fan is sped up to cool it back to normal. I found that a 330 resistor is about right to do the job. I even sent a resistor to one guy Steve to do it for his car.

You switch it in when you want it and out when you dont, using thin wires cause its a sensor. I like it and its not too extreme to damage the fan. The fan gets a variable voltage from 4volts and up as needed.

Chillin Woody

The photos below should be readable. I did not clean this up as I wanted to get it out and with the pace Iam doing things a clean drawing means something else goes missing.

I have a bunch of resisitors and I can return one to your self addressed stamped envelope if there are no radio shacks near you? THe postal police require two stamps 42 cents cause the letter is a tiny bit thicker and thats extra, see you learned something else. Its still below 1 oz, just thicker, go figure. Woody

 

I think this is the way to go. I am accomplishing this in the near future.

Thanks again Woody,

Steve