Hello i have a question i have a 1995 chevy lumina and my ac fan is not working what can i do to see if i need to replace it or make it work

at a junk yard

Undo your terminals... Get a battery cleaner (fine scrapper) and clean(scrap) your battery post AND terminals.

Sounds like the signal switch inside the steering column needs to be replaced. Probably has some burnt contacts.

How did you determine that the sensor failed. Did the check engine light come on? When you say that the fan won't turn, do you mean that it won't turn on and run or that you can't physically turn it by hand. To determine this, disconnect the electrical connector to the fan and try to turn it by hand. It should turn easily. If it doesn't then it must be replaced. If it does then reconnect the electrical connector to the fan and try to operate it by disconnecting the temperature sensor lead and placing a jumper wire between the terminals of the harness. turn the AC control to AC/MAX and turn the ignition key to on. If the fan runs then the problem is the sensor. If it doesn't then check the fan control relay and any related fuses. WARNING : Use extreme caution when testing the fan circuit. Never attempt to turn the fan with the electrical connector in place. The fan can operate at any time even if the engine is off.

down by the start is a fused link, this link may have burned out and will need replaced before you will get voltage to the starter

you either A.) need a speedometer cable or B.) you need to rewire your wires behind your CD deck, my friend and i did this and it fixed his speedometer cable and made all 4 speakers work again

In a Lumina if the brake lights quit working but the upper one in the rear window still works or your tun signals flash weakly or a different speeds the turn signal switch needs replaced. I will cure the problem. Not to hard a job, but does require removing the steering wheel and air bag assembly.

no...one is for the ac and one is for cooling

The problem is most likely the blower motor resistor. I'm not sure where it is located on your vehicle, most are on the firewall under the hood or near the blower motor itself.

http://cgi.ebay.com/ebaymotors/1995-Chevrolet-Chevy-Lumina-Owners-Manual_W0QQcmdZViewItemQQ_trksidZp1742Q2em153Q2el1262QQcategoryZ6760QQihZ009QQitemZ190171395968

Here ya go.
Good luck
Dave E. (Illeagle)