Bought new camaro and electric fan is not kicking on while im driving causing my car to over heat, replaced single with dual and they worked for a lil bit then they only started working when i turned on the a/c.

Any Advice?

 

Did You Check The Fan Relay. It might also be a short or the temp sensor. Last Thing to check is the computer. If all else fails try hot wiring the fans to something that comes on only when you turn the key on. Nice car by the way.

 

Did you ever get around to checking the fan relays?

1) Do relays have 12vdc power?
2) Is temp switch closed when engine is hot? (if installed)
3) Do fans have good ground?
4) Does temp switch have 12vdc power?

Not sure how the fans could be impacted by the A/C system. Will need more details to help with that.

 

i would check the temp sensor. mine was stuck on -40 degrees causing the computer to think the engine was cold and thus not allowing the fan to come on. a quick fix is wiring the fan directly to the battery with some kind of switch. i did this untill i got it fixed and it worked fine.

 

Could be a bad fan switch.

 

I`m assuming if your car had a single fan and you hooked up dual fans that you spliced the fan wires together and connected them to the existing fan wire so they both come on at the same time? On cars that come stock with dual fans, the secondary fan comes on when the air cond. is turned on. It sounds like you may need a new fan switch. I`m not sure on single fan cars if the fan is controlled by the ECM or thermal fan switch. I sent you a message about wiring diagrams, let me know.

 

if it was the relay then it would never turn on even w/ AC. Most likely the fan switch. the switch that tells the ECM what temp it is and then the
ECM turns the fan on.

 

w/ ryan... check the coolant temp sensor, and fan switch for a short.

 

The fan is controlled by a fan switch in single fan cars, at least it is in my 92.

 

cool, i know alot about older motors but this TBI crap is just different to me this is the 2nd one ive owned that was. Thanks alot. i'm just going to start with the first then keep going down your guys list. and engineerbrad thats an old camaro thing. if your getting hot turn the a/c even if it don't work, kicks fans on

 

if i remember right the cooling fan relay is controlled by the temp sensor and the ac switch check all wires at relay but its prob the temp sensor but i have seen the relay only have power on the ac side i guess if all else fails put it on the switch it will run as long as its on