New resistor and checked fuse box, and new temp sensor. The fan will not turn on when the car is idle, overheating after 20 min.
But works fine on low fan speed when AC is on, and its good all the way.
Does the fan works when i put 12v where the relay is : Yes.
Does the fan works on low level: Yes with AC on.
Temp giver is new?: Yes.
have you flushed and take off the thermostat to try? :Yes.
Have you get rid off all air in system? Yes!
Have you new relay? No works fine with AC on.
What shows in the gauge temp on dash? Litte bit over normal.
Do you have heat in car? Yes big heat


Relay fan stage 1,2.

stage low
12,9 V on pin 87 and 0v on 30 pin
This is odd

Stage high

30 pin 12,9V and 0v on 87 PIN

The post i have been reading is problem with AC on and no fan, i have fan on AC on only-

 

The gauge on the dash is either at 0 or mid or in the red. It has nothing in between.

What I would do is to grab an odb2 scanner and check the coolant temp. From the top of my head the low fan should kick in at 105c and high at 112c.

Coolant is a funny substance put it under pressure and the boiling point raises above 100c. So what could happen is that your coolant system isn't holding pressure which causes the system to overheat and not reach the needed 112c to make the high fan kick in.

Causes of not reaching pressure could be things like expansion or thermostat housing cap (depends on r50 or r53), blown head gasket or something like leaky waterpomp or even a crack in the head or block.