Originally Posted by frankymtz1
I Gotta 96 Trans Am The Fans Won't Turn On Automatically I Gotta Have The A/C On For Them To Turn On I Have The Connection That Runs To The Water Pump Connected And They Don't turn On I Disconnect It And They Turn On, How Far Does The Temp Gauge Needle Gotta Go B4 The Fan Turns On.. Thanks.
Low speed fans come on at 221° and the high speed at 235° without the A/C on.
The reason they come on when you disconnect the temp sensor is because that's the default safety feature for the fans.
( actually the voltage feedback sensed by the PCM goes to zero, which tells the PCM the temp is over 235° )
If your engine is over heating and the fans don't turn on, I would suspect that the temps sencor is bad and needs replaced.
They do fail.
96 T/A, Black/Graphite Leather, T-Tops, 6 speed, 10 speaker Delco/Bose "Monsoon"
Original owner, 200k miles and counting.
Total engine rebuild at 187,020 miles. AIR delete, bored .030 over.
Comp cams Xtreme Energy LT1 266HR-14 street cam and springs.
Custom leather interior at 290k miles. Total repaint 193k Miles
Last edited by NavyVet; 05-02-2013 at 04:46 PM.