Jump to content

Manual and Auto Fans


Recommended Posts

Posted

If I wire my fans up to a switch will they still come on at the auto times? I want them to come on automatically but I want the choice to turn them on..

Posted

I think you could wire a piggy back to the wires, and turn it on by a switch then. Best way would be to wire a switch to the cooling fan relay, That way you arent really interfering with the existing wiring. I just wonder if the computer is going to throw some code about the temp sensor or something..

Posted

you could custom make a circuit to do that.

 

you could tap into the turn on wire(s) fed by the pcm, so that you are operating the relay the same way as the PCM, but the issue I ponder, it whether or not it may harm the ecm to electrify the wire. if that is the case, they you should ad an inline diode.(I think)

Posted

I dont wanna be an asshole here, but why do you want to do this? The computer already controls when they come on, and the coolant will not get hot enough to damage anything.

Posted

Well I just want the control. And just so I’m clear I can put a wire around that pin on the relay and run it to a switch it will still come on at automatic times but i will be able to turn them on when i want? I looked it up on the w-body page and it looked extremely simple.

Posted

Well I just want the control. And just so I’m clear I can put a wire around that pin on the relay and run it to a switch it will still come on at automatic times but i will be able to turn them on when i want? I looked it up on the w-body page and it looked extremely simple.

 

 

thats the exact same way i did mine! it will work like normal and you can turn them on whenever.

Posted

you could custom make a circuit to do that.

 

you could tap into the turn on wire(s) fed by the pcm, so that you are operating the relay the same way as the PCM, but the issue I ponder, it whether or not it may harm the ecm to electrify the wire. if that is the case, they you should ad an inline diode.(I think)

 

The relay wires are always hot (w/ ign on). All you need to do is ground the other sides.

 

http://www.w-body.com/upgrades/manualfancontrol.html

 

It is extremely simple, just make sure the wire doesn't short against the wrong contacts.

 

I'm doing this properly as I have all my STE wiring apart. I added additional wires to the underside of the relays (soldered) and ran them through the firewall C200 connector as new pins. It looks factory. Just need to decide on the switch location in the car.

Posted

When I wired it up to 86 it was blowing a fuse.. By this picture do you know witch on i should hook it up to??

 

fanrelay.jpg

Posted

After replacing the fuse I'm getting a service engine soon light... Any ideas?

Posted

hope you didn't screw the ECM.

 

you're only grounding the wire, right? it's not supposed to be hot.

 

did you try using 85 instead?

Posted

I tried 85 on fan 2 and it didn't do anything.. I haven't tried it on fan 1

Posted

ok well fan relay 2 was on a 15 amp fuse. It was also an EGR and O2 fuse. That explains my service engine soon light. I replaced both fuses but I still don't understand how it was blowing the them.. by the picture below it looks like when you ground 86 the fans should come on... I'm new to electrical work but i just don't get it. I think that maybe the wire is touching other pins... What do you think?

 

DSCN0328.jpg

Posted

yea 86 should definetly turn them on.

Posted

Well I tried 86 again and pop goes my fuse... I replaced it and wired it up to 85 and the fan came on.. So i guess its 85 for me. I guess i don't understand that wiring diagram unless its not for my car... :willynilly:

Posted

you should do a write up with pix :D

 

I want to do this to mine as well, I don't like how hot it runs.

Posted

Yeah same here. I've never seen my other fan come on, just the drivers side.

  • 2 weeks later...
Posted

Well I finished a week ago and they've been working fine. Whenever the car heats up the fans automatically keep it cool whenever the heat rises when parked or at a long light I just flip them on and it cools down. I highly recommend doing this to any daily driver. It’s extremely useful!

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...