I have an 88 Firebird Vin E TBI with the L03 5.0L; however I am swapping over to a new carbed 350 and I understand that the stock electric fan is controlled by the ecm. How will I get the fan to work properly without the ecm? I'm a little confused when it comes to the wiring. Sorry if this is basic question but I'm totally lost. Any help would be appreciated. Thanks.

 

If you have a stock, single fan you can get by with a standard 30A fan relay kit. Use your stock coolant temp switch to trigger the relay. If you want, I stock everything from a simple kit like that to a 3 speed resistor harness designed for extremely HO fan(s) setups. If you have your old motor still you'll want to retain the temp switch and connector/pigtail. If not, no worry I stock those parts in stock if needed. PM me if ya want. A basic relay kit is about $25 plus shipping. What you need isn't too complicated to assemble and install.

 

Do you have a functioning AC system?

 

My AC is not functioning at all. I believe the electrical connections are unusable.

 

that makes life easier when wiring a fan.

get a relay harness
wire 30 and 85 to battery
86 to fan switch in the cylinder head
87 to fan positive wire

the fan can spin both ways (push or pull air) depending on which wire you hook 87 to. test the fan on the battery before you install the wires for good so you know.

voila, you have a automatic cooling fan setup. easy peezy

 

Where can i find this fan relay kit at?

 

should be able to get one at any autoparts store

 

I'm looking to go this same route with a dual fan set on a 87 TPI GTA... Will this diagram work as well for the dual fans ?

 

210F on and 200F off

 

"get a relay harness
wire 30 and 85 to battery
86 to fan switch in the cylinder head
87 to fan positive wire"


What happens when you shut the engine off after fan has already come on?

 

Wire the + side of the relay coil to 12V Ignition like in my diagram.

 

That type of relay is not going to last long on any quality dual fan setup being rated @ 30A (from the looks of it...not to mention I can tell by the wiring it is Taiwanese and not rated J1128 for under hood temps) -the inrush current along on a dual fan setup is enough to kill it. But, this depends on what type of dual fans you plan to use. So will this type of single relay work? Yes. For how long? That's is up for debate.

 

Even the stock dual fan setups have two relays, I would certainly advise doing the same. Both can be signaled by the CTS

 

 

One fan switch, 2 relays and a connector like this one with 2 wires to activate the coil on the relay.



http://www.mamotorworks.com/Corvette...e-kit-611171-1

 

https://www.thirdgen.org/forums/cool...ml#post5807839