I'm adding a couple of leds to get a little extra
infos on engine and cooling, which is not a luxury
in this very hot weather.
I have a blue led that goes on when the a/c
compressor clutch trigger and a green one when
the a/c condenser fan goes on.
Both are quite easy to wire, using the relays
of both system.
I want to add a red or amber one and have
it working with the a/c thermoswitch.
The thing is that particular thermoswitch will
cut the flow of current after passing i think
106º C. So i need to light a bulb when current
I was told about a PNP diode or something like
Anyone familiar with electronics ?