Bit dodgy I know, but I usualy clamp the -ve on the block somewhere like a head bolt then carefully touch the +ve direct to the output side of the up or down solenoid.
Unfortunatly I don't have any experiance with Yammies regarding exactly where the bleed valve is etc, but have found the archives on some of the US forums very helpful researching stuff like this.
I'm sure somebody else will come along soon and point you in the right direction.
RIBBED For extra pleasure.
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