Kangoo 2003 1.9 Radiator Cooling Fan Problems

Hi,

my cooling fan woun't work, even when temp becomes high. it doesn't work even when AC is on.



checks I made:

0. fan circuit 50A fuse burned, and replaced.

1. fan has good ground.

2. fan motor is ok (checked with direct connection)

3. both relays for high and low speed are ok.

4. fan resistor for low speed is damaged (Thermal Fuse burned out and the spring is fine, so I made detour for now).

5. when doing detour for each one of the relays, it activate the fan.



The Problem:

Car temp rising, but the relays don't get any ground to it, so the fan isn't starting to work.

also, when disconnecting the relays, there is 12V+ in the wire that should containg ground for activating the fan.



finally, when driving with no traffic and no AC on, car temp on gauge remain steady on the middle, so probably it's not thermostat.



What could it be?

Could it be the temp sensor? (it has 4 wires)

If you think it is, so why when AC on the fan isn't working, and why temp on gauge is fine?

I'm not sure how to check the temp sensor...



Also, do you know what thermal fuse I should buy for the resistor? I can't read the temp data on it since it's wiped out.



Thank you for your help!!!