To check fan you can pull Radiator Fan Relay and jump terminals with a wire here's how...
1) Pull relay
2) with test light attach clip to a good ground then touch each socket make note of all that light up.
3) with a wire stick one end in one of the sockets that made light come on the stick other end in one of the sockets that didn't light up. If fan doesn't come on try next socket that DID NOT light up.
If after trying all sockets that DID NOT light the fan didn't com on then it could be a bad fan motor or bad wiring.
To check wiring find plug near fan motor and disconnect, using test light clipped to good ground insert tip into one of the sockets on the fan side. Make sure you still have jumper wire in place at the relay. If test light lights then wire is good, if not then do same as mentioned above till all sockets have been check.
If test light doesn't light then you have a bad wire.
You can straight wire the fan to check the fan. Just run 2 wires from the battery to the fan plug.
If jumping relay turns fan on then you have may have a bad relay you can check this by looking at the numbers on the relay then looking at the surrrounding relays and see if any match if so then just swap out those relays, making sure you remember which ones you swapped.
If relay seem to be good and fan still doesn't come on then it is most likely the Coolant Temp Sensor.
The Coolant Temp Sensor is located on Cylinder Head near Thermostat Housing.
Thursday, January 22nd, 2009 AT 1:12 PM