Hi TPS, thankyou again. It seems that he wiring goes straight into the plug - I put a voltmeter and the voltages are shown. the + was connected to the + of the voltmeter. it looks like all inputs go to Port 1? Is -2.67V correct - I found that image online and it says its 5V input, but it is +.
The issue is, I dont think its a 4 wire sensor, uless there is resistors hooked up inbetween the sensor and the plug?
Thanks TPS,
Anthony