Can anyone tell me which colour wire is which on a Spi Fiesta (webber) throttle position sensor. I have red, yellow and green out of the sensor going into white, brown and yellow at the plug (cut from the Fiesta loom)
Nick

I followed the details on the following site CLICK HERE and it works fine.

Mine is a mondeo TPS but they are probably much the same but with different colour wiring.

HTH

Do you have a multimeter that measures resistance? You want to find the two wires that show no change in resistance between them when you twiddle the throttle, this pair will be the +ve supply and ground. The other one is the signal. To work out which way round the ground and supply are, measure the resistance between the signal wire and one of the others. If it goes from a low resistance when the throttle is closed to a higher resistance as you open it, it's the earth. If it goes from high resistance at closed throttle and decreases as you open up, it's the +ve supply

Thank you, I should be able to work it out with the meter now
Nick