Hello,
we own a 91 MR2 Turbo and my cooling fans in front of cars don’t come on even if the car has been running for quite a while. i checked these fan relays 1,2 and 3 for functionality and they all work. but if i disconnect the water temp sensor on the radiator they all come on and stay on even when the ignition is at the on position only. would it be the water sensor the problem? thanks