Update time
bought new fuses for top of battery 2x 30 amp 1x 25 amp so changed all these
bought a tin of industrial grade non residue electrical contact cleaner and sprayed all connectors concerned
re- bled coolant system just incase any air trapped
removed and dismantled the fan control unit and sprayed all connectors with the cleaner icluding the circuit board and both relays
noticed that someone had been in there before me at some point but all looked well no burning on contacts no dry joints etc
cleaned up the temp sensor ( and noticed it was the original black one )
put it all back together turned on ignition ( no electric water pump) Hmmmm
bled the coolant and waited for the fan to kick in, it came on at an indicated 105 deg C and both fans were spinning very quickly , and stayed on a little while after the display was back at 90 deg C ( this happened very quickly ) this was found in elsawin courtesy of Rossbrownlee
Picked this off Elsa if it helps:
14 -
Radiator fan thermal switch -F18-
q
Switching temperatures: Stage 1 on: 92 ... 97 °C/ off: 84 ... 91 °C
q
Switching temperatures: Stage 2 on: 99 ... 105 °C/ off: 91 ... 98 °C
so seems that my stage 1 isnt working but the car isnt overheating , can anyone sujest a fix or is it a simple case of change the fan cut in switch ?
as for the air con fan aka my original post, after doing all these jobs and re reading the links i posted above , I went and took a gamble and had the air con recharged , sure enough the air con pressure switch was doing its job as the pressure was too low in the refridgerant circuit therefore not allowing the circuit to open , so recharged it and now with temp set at low auto light on econ light off both fans are running on fast speed and the cabin is ice cold lol.
next problem to be solved why dosent the rad fun cut in at speed one only speed two ( poss therno fan cut in switch defective ? )and can anyone tell me exactly when should the electric water pump be on and how to test it and is there a sender switch for it seperate to the fan thermo switch
thanks to any and all who can help cheers Don