hi I've read a lot of the topics here, and it seems there are some really smart people here

I hope I can get some good advice on my neon
the fan runs, the only way i can get it to shut off is by pulling the fuse,
I've replaced the each of the relays with a new one, one at a time, and put fuse back in and the fan comes on.


has anyone had a similar problem?

 

mine did that, sometimes i had to pop my hood and smack the relay box hard, then it would shut off.

 

well i thought it might be worth a try, but it didnt work

did yours stop doing it on its own?

 

its weird, sometimes it does it, and sometimes it dont. i need a new relay cause this one is sticky i think. you may have a short in the wireing or something tho. check all the fan wires carefully.

 

Could be a bad relay or temp sensor, I am trying to remember if the neon uses a separate temp sensor for the fan or its computer controlled.

 

The fan is controlled by the PCM, based on input from the coolant temp sensor which has two outputs (the other goes to the instrument cluster and is barely a step above an idiot light). If your a/c (including defrost mode) is on, the fan should run nonstop. If your a/c is off, the car is cold, and the fan is running, then it's either a faulty signal from the temp sensor, a bad PCM (really really rare), or a sticking relay. You can pull the relay and swap it with any other relay in the PDC (black box behind the battery under the hood) to check it. I've had the horn relay stick before, talk about annoying... The relay should only cost $15-20 at a parts store if it needs replacing.

Best of luck!

 

I have already replace the relays with a working one
I guess i will try the tep sensor
thanks for the info

 

just to add a twist to my problems, my trans has been shifting bad, slipping.....
when the fan fuse is pulled, I don't have this problem, my girlfriend didn't like the solution of runing the heat at full blast to keep the car temp down so I put the fuse in to run the fans, instantly the trans started acting up again

what exactly is a PCM?
could it be causing this problem, or am i just not keeping the trans fuild at the right temp?

 

pcm is an engine computer, located on the drivers side fender well. when looking for one, year and trans type will play a roll in getting the correct one. also compare numbers located on the pcm. it will be a long number located on the sticker.

 

well the problem turned out to be a bad temp sensor, boy it was a pain in the *** to find, muchless change, but I did manage, the shifting problem seems to have stopped......... for now

Thanks for the help