19. SWITCHES/HORN/FUELUNIT/THERMOSTATICSWITCH /TEMPERATUREGAUGE/INSTRUMENTS/LIGHTS GRAND DINK 125/150 Thermostatic Switch THERMOSTATIC SWITCH INSPECTION Remove the front covers. ( 2-5) Start and run the engine to make the water temperature reaches 8590 and check if the cooling fan motor operates. Lower the water temperature to 85 and check if the fan motor stops. If the fan motor does not start, disconnect the wires from the thermostatic switch and then connect a jumper wire between the Wire wire harness and thermosensor wires (black and green wires). Turn the ignition switch ON. The thermostatic switch is faulty if the cooling fan motor runs properly. If it does not start, check for voltage between the fan motor coupler wire terminals (blackgreen). If there is no voltage, check for the following: · Blown or faulty fuse · Loose terminals or connectors · Shorted wire in the wire harness TEMPERATURE GAUGE Disconnect the wire from the thermosensor and ground it to the engine. Turn the ignition switch ON. The temperature gauge needle should move all the way to "H". Do not leave the thermosensor wire grounded for longer than 5 seconds or the temperature gauge will be damaged. HEATER CONTROLER UNIT INSPECTION 1. Open ignition switch to check if the black wire of it is enough voltage. 2. Put the heater controler unit in refrigerator. Start engine after keeping the temperature under 104. 3. Check if the yellow wire of heater controler unit has output voltage. Start engine and if the temperature of heater controler unit is under 104. Check if the white/blue wire of heater controler unit has output voltage. If it has not any voltage. It is damaged. 19-6