Fan diagnostics.............
Reach up behind the radiator, does the fan turn freely?
Remove the front plastic and gas tank. Right front corner of the tank is the thermostat housing and temp switch that controls the fan.
There is a red/white wire feeding the thermal switch, test it for 12 volts. Ignition and kill switch on. Yes?
A blue wire leaves the switch and goes to the fan.
Unplug the thermal switch and jump the two wires in the plug, the fan should run. Yes?
A blue and a black wire plug in to the fan, the blue can beconnected to the plus terminal of the battery and the black to negative or a frame ground. Fan should run.
Drain the coolant, remove the thermal sensor from it's housing, attach wires to the connections on the switch. Take the switch into the kitchen and put it in a pan of water. Hang it or support it from touching the bottom of the pan, you want the heat to transfer thru the water not the metal. Connect a Volt meter to the leads and set it for resistance. Put a meat thermomiter (sp) in the water and turn the burner.
The switch should read high resistance or open circuit below 210 deg, around 210 deg it should close and themeter should read low or no resistance. Turn the burner off and watch the drop in temperature the switch should reopen around 200 degrees.
While every thing is apart the thermostat is right there also, you can put it in the pan also and watch it open and close. 160 degree's is the point it should open.
Some people like to have a manual switch to control the fan. I you want one use the red/white and the blue, the two wires at the thermal switch. Place the manual switch in parallel with the thermal switch and you'll have both manual control and (if it works) the automatic switch. Just cut into the red/white and run a lead to one switch terminal and the other sie of the switch connect to the blue.
Well that got a little longer than I thought it would, hope it helps.
Reach up behind the radiator, does the fan turn freely?
Remove the front plastic and gas tank. Right front corner of the tank is the thermostat housing and temp switch that controls the fan.
There is a red/white wire feeding the thermal switch, test it for 12 volts. Ignition and kill switch on. Yes?
A blue wire leaves the switch and goes to the fan.
Unplug the thermal switch and jump the two wires in the plug, the fan should run. Yes?
A blue and a black wire plug in to the fan, the blue can beconnected to the plus terminal of the battery and the black to negative or a frame ground. Fan should run.
Drain the coolant, remove the thermal sensor from it's housing, attach wires to the connections on the switch. Take the switch into the kitchen and put it in a pan of water. Hang it or support it from touching the bottom of the pan, you want the heat to transfer thru the water not the metal. Connect a Volt meter to the leads and set it for resistance. Put a meat thermomiter (sp) in the water and turn the burner.
The switch should read high resistance or open circuit below 210 deg, around 210 deg it should close and themeter should read low or no resistance. Turn the burner off and watch the drop in temperature the switch should reopen around 200 degrees.
While every thing is apart the thermostat is right there also, you can put it in the pan also and watch it open and close. 160 degree's is the point it should open.
Some people like to have a manual switch to control the fan. I you want one use the red/white and the blue, the two wires at the thermal switch. Place the manual switch in parallel with the thermal switch and you'll have both manual control and (if it works) the automatic switch. Just cut into the red/white and run a lead to one switch terminal and the other sie of the switch connect to the blue.
Well that got a little longer than I thought it would, hope it helps.
