If your talking about radiator fan, take the electrical connector loose from fan, use jumper wires for voltage and ground from battery, see if it will run. You may need to use inline fuse, just in case. Hang on for a minute, Ill find wiring info.

Check for applicable trouble codes, see if there is a code for the coolant temp sensor? Will the fan run if you turn on the ac?

For the radiator fan, brown wire is voltage. Black wire is ground.