Check to see if it is getting power - if so could be bad fan motor - if not check fuses, relay, and temp sensor
First check the fuses.
there could be many different factors in the problem could be that your cooling fan does not come on or your radiator is plugged or maybe your thermostat does not open or it could even be low on anti-freeze.
Check for a blown fuse.
Check your fuses... Also check your wiring connections... Exc.
Unplug the connector to the fan, next run a pos. and neg. to the connector from the battery to see if fan starts.If not, replace fan. If it does run then check the coolant temp. switches. There should be two on this vehicle.When the engine is warm they will have very little resistance to ground (ohms).If the engine is warm and they give no or open reading on DVOM they will need replacing.
The 2002 Mitsubishi Montero Sport is equipped with a single thermostat in its cooling system. This thermostat regulates the engine's temperature by controlling the flow of coolant. If you're experiencing cooling issues, it's important to check the condition of this thermostat rather than looking for a second one. Always refer to the vehicle's service manual for specific details.
Check your owners manual
check your bulbs some bulbs have two filament on them one may be out and the other working.
Check the fuse.
Check fuse
its amisubishi montero 1994 safari and don 't no how put power steering in the car
check the fuse box under the hood in the engine compartment
under hood in engine compartment check under dash also
.44 Check your owner's manual, (0.028 − 0.031 inch) for a 2003 3.8L.
Check the top of the intake manifold right by the ignitors. There sould be stamped on it the firing order.
Could be a restricted exhaust such as a damaged catalytic converter. Could also be a problem with fuel delivery. If you have a check engine light illuminated, check for codes.
Check the fuse or the wiring