Cooling fans not running and over heating

Tested problem this morning. Cooling fan only kicks in when A/C or Defroster is on. When turned off, cooling fan will not kick in. Is this a relay problem? If so, where is it located? Thank you.

Did you ever figure this one out? I have the same issue on my 96

Not yet. Been using it with A/C running all the time (not a bad thing since I live in Florida) just to keep the fan going. I'm probably going to finally bring it in. I've replaced the temp sensor on coolant line, fan relay, and battery. No luck.

Mine seems to be working now. I changed all 4 relays in the box under the air filter arm to the intake.

After that, I flushed the radiator and bled out all air bubbles by running the engine from first start for 10 minutes with the radiator cap off, heat on full blast and jumping on the car to wiggle bubbles out. I also made sure that the coolant in the radiator fill area was full to the top because the engine temp sensor is just past the cap so if air gets in that area it will malfunction.

From there, I pulled out the aftermarket radio and double checked all the wiring finding that the stock amp plug was never taped off by Best Buy install techs. So I taped it off and put it all back.

It works great now.