electric fans not working

[robztheman]

94 cutlass supreme i just got the car for500$.it had blown head gasket so i replaced that and water pump. started the car and the electric radiator fans wont come on,i wired them strait and the motors are good. i replaced the temp sencers when i did the head job.i then took a volt meter and checked the fuse panals and replaced the relays they are getting voltage from one leed but there are 4.i was wondering if there are more relays or something that i am missing?oh yeah i also checked the fuse panel in the car . any help please thank you

[DIY Mechanic]

I bet they are fine.

The driver's side fan should come on when the AC is on, normal temperature is reached and the car is traveling less than 20 mph or idling.

The only time I have been able to get the other fan to come on is when the AC was on, the outside air temp was 90, the motor was at temperature, idling, and I was using straight water, no antifreeze/coolant.

As soon as I replaced the water with 50/50 antifreeze I could not get the second fan to run.

It is an aux fan that is not needed under most circumstances.

It is good to know that running through the hot summer desert will not over heat this cold natured car.

[robztheman]

thanks sorry if i dident say so but the car over heats and the fans dont come on.at all ether one of them with or without the a/c thanks for your help

[richtazz]

I assume you changed the relays under the hood. The next thing I would check is the wiring from the coolant temp sensor to the relays. If the relay's aren't getting a signal, they won't be able to turn the fans on.