90 is round about middle, ok so dont let it more than about 5 degrees above middle.
most fans come on at 96oC & off again at around 86-88oC
If you disconnect the temp sender the fan should come on by default, never bridge out the sender though as it's ECU controlled and internal damage can occur.
90 is round about middle, ok so dont let it more than about 5 degrees above middle.
sensor will be on block (your looking at the resistor) i'll check exactly where it is.