97 GTV TS Radiator Fans not actuating
Hello, I would be grateful if you coud please help.
I have a 97 TS GTV lusso ( dual cooling fan with AC).
Recently my radiator cooling fans have not been triggering on when the engine temp increases beyond the 90 deg mark.
I have recently replaced the thermostat, and the water sensor attached to the top of the thermostat and also both resistors within the radiator housing.
I have carried out the removal of the lead connected to the water sensor to see if the circuit to the fans themselves is functioning , and yes when i do this both the fans immediatly come on, initially at low speed then some seconds later at high speed.
So my question is as follows:
1) has this test proved that all resistrors, wiring, relays and fuses to fans is functioning and my problem lies within the ECU not sensing the temperature and hence not triggering the fans on?
What suggestiions do you have? I do not have alfa diag and am unsure as to how to test that a relay is functioning by using a multimeter.
I tried the ECU reset procedure requiring the -ve terminal of the battery to be removed followed by 90 secs in MAR position then 90 secs OFF position then start and leave...all to no avail.
Thanks in advance for any suggestions.