Midgey
The fans run direct through the sensor in the radiator, of which the points are not strong enough to carry the current drag of the fan motors, especially if you have two [2] fans. Utilize a relay and use the sensor in the radiator to trigger the relay. After replacing the sensor twice, I knew something different was needed. I took apart the sensor and discovered the internal contacts burnt to a crisp. I installed the relay and six [6] summers of driving without a problem. Last year I modified the circuit and tied it also into the overdrive circuit on the gear lever switch : 1st, 2nd & neutral - fans on, 3rd, 4th & overdrive on - fans off. Helps in city driving and I don't have to keep an constant eye on the temp gauge.
Regards, Bob