added a second slim fan, now its overheating

[Bastard1g]

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Well, my turbo gasket was leaking and it melted my stock ac fan. So, I installed a second slim fan in its place and I wanted it to come on at the same time, so I wired it up with the other fan. I read somewhere on dsmtuners that a few others did it and it didn't blow fuses. So, they both come on, but for some reason, they don't work as well as just one did.

So, is it possible that by wiring them up together (both power and ground wires are ran off of the same wire harness for cooling fans) that they are not getting as much power as they should? It's been a long time since I have worked on cars and even longer since I did any electrical work, so I have completely unlearned any electrical knowledge that I had at some point.

If that is the case (which I suspect is the reason why it is overheating now) how would I be able to wire them up so that they both come on at the same time at full power? I don't want to run the second fan off of the ac because I don't want to have the ac running all of the time.

 

[squeak104]

I wired mine to come on together with no ill effects. Are you certain the slim fan isn't wired backwards?

 

[nuclearr]

If you wired it to the a/c fan you will over heat, it will only come on after it starts to get hot and not when the first fan is supose to come on. You should wire it to the plug off the old fan you removed.

 

[Jafro]

This.

I wired mine to come on together with no ill effects. Are you certain the slim fan isn't wired backwards?

Been there. Done that. Hayden fan replacing a Hayden fan. The replacement wires (black and blue) were wired backwards from the one preceding it. Overheated unless I was going at highway speeds. You can't really feel which way it's blowing in the engine bay, but reach in there with a piece of paper and you'll see.

 

[rstchris]

The fan motors will only take as much amps as the need and if they need more than they are getting the fuse will blow. Make sure the fans are tight against the radiator cause a gap will make them lose lots of efficiency.

 

[talontd92tsi]

Most slim line fans have reversible blades as well, one way for pusher, and the other for puller.... I have made that mistake before, there is usually an arrow on the blade showing the way it is supposed to rotate for that direction. If it is on backwards, it will move no air and cause overheating.

 

[Bastard1g]

Well, the problem is that I seem to have a short somewhere in the system. When I turned on the ac (doesn't work) the fan did not come on. So, I ended up jumping relays to get it to come on. The only downside is that I have a speaker wire carrying 12volts from the fuse box to the fan. Not exactly clean.