My radiator fan will not work on my chevy corsica 1996. it comes on when i wire it manually what is my problem

Sounds like you have a loose connection somewhere. You will need to remove the light and start tracing the wires.

The computer takes info from the engine temp sensor to decide if the fan is needed. The temp sensor is on the intake manifold and has two wires. Check the relay too.

You will not be successful replacing just the switch. Cars with delay wipers utilize different wiper motors, and wiring harness's than cars without.

Try the free online service manuals at:

http://www.autozone.com/autozone/repairinfo/repairInfoLanding.jsp

Sign-up for access, just takes a second and an email address.

It is inside the vehicle towards the centre front of the floor, against the firewall and floor. If you want to remove it you will need to drain the coolant from the radiator and disconnect the 2 hoses going through the firewall. Remove the side panels from the centre console.Then comes the heater ducting and the core cover. You have very little space to work in so lots of patience is called for. And begging, followed by swearing and pleading. Once done you will have saved yourself upwards of $500 in labour costs.

Some parts houses will rent coolant pressure tester,Sometimes for free with refundable deposit. pressurize system at radiator cap with radiator and reservoir full. Look for white residue from dried coolant. You will probably need to look in the area where you see coolant leaking. Most likely you will find a hose leaking , could possibly be leaking from radiator

very easy its located right in front, down towards the ground near the oil pan between the radiator and engine. two bolts and two wires hold it in . first you must disconnect the battery.

on the radiator is a switch whit two wires.
bridge the wires and see if the fan runs.
if so the temp. sensor dose not work. replace sensor

You may have a stopped-up heater core. It's a little radiator inside your dash; it's where the heat comes from. I don't understand why the temp gauge isn't reading any higher than that...

the temp sensor is probably stuck in the open or hot position the fan temp sensor probably needs to be replaced.It could also be that you have a short in the wiring harness......most sensors like this complete the ground circut so if the wire is touching a ground some where the fan will think the sensor is telling it to run. check the wiring harness first itll be the cheapest to repair. these sensors are generally somewhere on the intake manifold.