I used this post from a search I had done.

https://www.thirdgen.org/techbb2/sho...ht=cooling+fan


After shorting out pins "A" and "E" my fan came on np. I figured at that point it was my relay. So I got a new one, installed it and tested it. My car got upto 220 and no fan. Not sure what the thermostat is but 220 sounds really high. Even after I secured the engine still no fan. Fuse checked out fine, and its a new relay. Fan still works when jumped out. What else can I check before I give my 1st born to a mechanic for repairs?

 

fan doesnt come on till 235 or so. Energize the coil on the relay, if it works check the temp switch

 

are you sure? boiling is 210. That seems abit hot.
Also where is the temp switch located? IF its a $20 part I'll just swap it out also

 

at 10lbs of pressure water boils at a higher temperature (i believe 246). Usually passenger side, below head

 

Damnit your right, I should have known that, being Military dealing with Evap's and such. We pull a vaccum on the water to boil it at a lower temp.
Same principle.
Anyway I'm sure someone has a pic of the switch I'll search for it

thanks again!

 

ok quick question if this operation is correct. I ran my car and let it heat upto about 220 again. This time I clicked on my AC and my fan came on and cooled it down. Is it possible for the 2 to be connected somehow? If this is correct then I won't worry bout it anymore problem solved.

Thanks in advance

V8 305
92 Firebird TBI

 

At the relays. The fans turn on when AC is on, but have you let the car run and check if the fans turn on by themselves?

It sounds as though you fans and relays are working fine. maybe just buy a new switch anyway (cost outweighs the unknown)