RichardW wrote:Mike,
I'm sure that's the right part - what ever the BOL says 8)
I repent, I'm sure you're right, having done a few checks...
If you unplug it then both fans should roar into life at high speed
Yep. they roared alright - frit the life out of me!
then clean up the pins and reconnect, then waggle to wire to see if you can generate a fault (is fans come on).
Both the sensor and the bitron connections were tightly fitted. I tested the continuity from from the plug to pins 7 (6.1R) and 14 (1.8R) and wiggled the connectors, loom etc but could not find a hint of trouble. Now it's all back together again the problem has gone away
Thank you for your input Richard.