I have fitted an ATF cooler on the passenger side of the car.
I want to set up a thermo switch that activates the air con fan once the ATF is getting too hot.

I would also like a warning light to go on in the instrument cluster once the thermo switch is triggered.

Are there any spare bulbs there?
I was thinking if not I could get it to light the N light

i thought kj 2 had leds