It appears that my cooling fan is not working. I have replaced the temperature sensor unit and checked the relay. When I connect the cooling fan wires directly to the battery it runs OK. I had a fault code 14 which indicates low voltage. I reset the diagnostic code and ran the engine for 60 seconds as recommened by my workshop manual and checked the code and it was 12 = OK. I also checked the voltage between the sensor terminals and it was 5 volts which is betwen the recommened 4-6 volts. The only thing I have not checked is for continuity between the sensor connector and the C10 on the control unit. Normally when I switch on the air conditioning compressor and switch on the ignition or run the engine the cooling fan runs, but now it does not. Also when shorting A/B on the diagnostic unit and I switch on the ignition the cooling fan should run but it does not. On my JD it does run. I have also swapped the relay and no difference.
Mar 13, 2010 at 2:13 AM
