I have the dual electric fans and one never shuts off. I put a new fan switch and it didnt help. Any Ideas? Work done was headers head work, and supention work.

 

Replace the relay. It should be on the firewall on the driver's side near the master cylinder. There are a few different relays there. To figure out which one is the culprit, with the fan running, disconnect each relay one at a time and one of them should turn the fan off when you disconnect it. That should be your bad relay.

 

WOW! Not even a break for Christmas? You da MAN!

Anyway, if the relay contacts aren't welded, you may want to take a look at the A/C high pressure fan switch. If that is unplugged (or the sensor has failed open-circuit) the primary cooling fan will run continuously.