coolant temp sensor

[steve_gti]

engine coolant temp sensor power feed i know it should have a power feed when its cold untill the engine get's warm then it cuts the fueling down, is it just earth fed or is it live and earth fed? im assuming it would be both.

i know its pin 10 on the ecu plug for the E.C.T orange wire so im assuming it needs a ECU if it has no power feed when the engine is cold.

[steve_gti]

sorry got my self confused its the yellow wire that's live not the orange i was meant too say theres no feed on the earth, when u test the earth with a test lamp it cut's the car out it should just illumie the test lamp not cut the car out