Thank you all gentlemen's., very nice of you to reply (many p-mail also)

I will try tonight with an analog multimeter.

My meter is giving me 120-450mv even when both + & - wire are stored
(touching nothing!!!) I guess my meter is not very precise when less than 1
volt.

But I know it's working because when I touch the OS sensor wire (Green) on
the van side(OS wire unplug) I get a steady .45 volt, as soon as I plug
back the OS wire (OS side to the green one) the voltage start oscillating
erratically and loosing the  steady .45 reading.

Good day gentlemen, see you on the road soon, very soon. (And peace on
earth, I really really wish for that every day, maybe one day, yes maybe
one day the human race will understand).
http://pages.infinit.net/eurokit/