Temp guage what number is the fuse, also is the relay a fat square object i think its on the passenger side,

here this will help. http://www.vadengmpp.com/owners-manual/chevrolet/1994-Chevrolet-Cavalier.pdf

try "fuse link" by starter relay on passenger side under hood fender looks like a "FAT" wire with a funny looking "price tag" hanging on it , the tag tells what it's rated for and part number

Fuse 15 in the passenger conpartment fuse panel. It is a green 30Amp Fuse

you did'nt specify what year,make,model of vehicle but will try anyway.fuel pump relays are usually found in the main engine fuse box under the hood.look for a black box either on driver or passenger side fenderwell of the car. open the box and look under the lid cover for fuse and relay locations.the relay should be a square black object about 2inches in size and simply plugs into the fuse box like a fuse.just pull upwards on the relay and it should just unplug,then install the new one in same place,just push it into the open fuel pump relay position.very simple to do. if you don't find a main fuse box,please repost your question with all the information on the vehicle as possible.thank you for choosing fixya.com

Either the switch is gone, or the fan relay is faulty.
I don't have my manual at the moment, so I can't tell you exactly where it is, but it's a small black square object usually mounted on the passenger side firewall with 1 to 2 others, or in the fuse box in the engine compartment.

There are 3 possible things;
The fan motor itself
The coolant temperature switch, which operates the fans, usually screwed into the engine block near the thermostat housing. Have to drian radiator to change it.
The relay-- It's a small black square shaped object, some are located in the fuse box in the engine compartment, and some are mounted on a bracket on the firewall, passenger side.
Could be in the wiring that connects these components.
To check the fan motor----- disconnect the wire plug from the fan motor, use jumper wires directly from the battery to the connector on the fan, If the fan works, then either the temp switch is bad, the relay, or the wiring.If the doesn't work, that is bad and needs to be replaced.

You don't say where you are.

You probably need a new thermostat. Cost for the part should be about $10. Labor to change it out should be $50 to $70, it takes less than an hour. Spring for fresh coolant, too.

The fans: the driver's side fan is activated by the A/C. I know, I know it's winter. But if you're running your defroster, you're running your a/c too. When the a/c is on, the fan can be on, too.

This sounds like you have blown a fusible link! Check your main fuses first.

you should pull out the gauge cluster and check the connector on the back side of the cluster.. i bet that is the issue

There is 1 Relay Switch and a Fuse that Operates this Guage Also. Check in the Fuse Boxes for these first.