Here's the deal its my daily driver 1990 Accord LX Just replaced the Battery and the Alternator (tested bad on the multimeter). Replaced the Ground terminal and the cooling fan is draining the battery by staying on. I realize its suppose to turn on when you shut the car off for a little while but it came on and I went outside an hour later to check on it and it was still running so I pulled the fuse. My question is what sends the signal to the fans to turn on. Is it the Temperature sender for the coolant, the ECM/ECU, or is it something else. Like I said this is my DD and I really need to get it up and running for class tomarrow.
Any help is appreciated.

Thanks
Nate

There are two cooling fans, one that is tied to the airconditioning which is called the condenser fan and the other is the radiator fan. Each is tied to its own temperature sensor and also to the cooling fan timer unit if your car has airconditioning. Each has its own relay. So the problem could be the relay, coolant temperature sensor or the cooling fan timer unit. Fuse no. 8 powers the relays and the cooling fan timer unit and no. 39 powers the radiator fan and fuse no. 29 powers the condenser fan. Remove fuse 8. If the fan stops it is the temp sensor or the cooling fan timer unit. If the fan stills runs, it is most likely the fan relay.

Oh God....I'm having flashbacks...this is how all that BS with my friend's '90 Accord started...with the fan staying on after parking it.

Found the whole wiring harness was falling apart, every time you fixed one place where it was shorted, it'd break someplace else...finally replaced the whole engine harness, it's OK now.

Hope yours is a simpler issue. Find the relay for the fan that's running, verify that's the correct one by pulling it and making the fan stop. When the relays stick engaged, usually you can give them a whack and they'll power down...if it does, you need that relay. There should be two identical relays, you can also swap them around and see if the problem follows the relay to the other fan, that'd nail it too...

Do what mpumas said first, though...

I'll check it after class

Well I went to the car today and I replaced the 15 amp fuse thats labeled Cooling Fan on the fusebox lid and the fan wouldn't come on. I turned the A/C on and started the car and it still wouldn't come on. I thought the A/C condenser fan is suppose to come on automatically if the A/C is on (at least thats how my SS is) So think it's the fan relay? It's also located in the fusebox right? Also fuse no 8 and fuse 39 where do I locate the numbers? The lid of the fusebox in the engine bay have the Amt of amps and the location but no numerical numbering system.
Thanks,
Nate

There is a 15A fuse for the condenser fan (no. 29) and there is also a 15A fuse for the cooling timer unit. Which fuse by size and description did you pull to get the fan to stop?
The condenser fan has a temp. sensor in the circuit so it only comes on wahen the temp is high. The radiator fan fuse is a 20A fuse and is in the under hood fuse box. The control fuse is on the ignition circuit and is in the passenger compartment fuse box on the drivers side.

Thanks for the help it turned out that the wire running to the coolant temp sensor somehow backed off. Plugged it back in and it works. The clip is broken on it so I'm going to have to zip tie it or duct tape it or something.

The same thing happened to my accord and it was the relay under the hood getting stuck. I had to tap on it occasionally to get it to turn off. Of course I didn't figure out the problem until after I had purchased a new battery that I obviously didn't need and the repair shop did'nt bother to tell me the old batt had no problem!