The whistling 20V, testing the Hitachi unit

[TWFAUST at aol.com]

I pulled my ISV to clean and bench test ('90 90 20VQ). It didn't seem dirty, 
but I used carb cleaner anyway. While disassembled, I hooked up a 9V battery. 
Not sure what was supposed to happen, but I expected motion from the 
"plunger". What I got was nothing. What is the correct test procedure? I ran test leads 
to the terminals on the ISV. I hooked up my DMM to the test leads and got 
approximately 9 volts. Since there are two terminals, I assume there is no need 
for a ground.

Interesting aside, the HItachi unit indicates the car is a '90 rather than a 
'91. It was a Rhode Island car and cars that old don't have titles.

My local boneyard has several 90 20VQ's, never thought to look ay what ISV 
they have. Will later units interchange? Can the "motor" be grabbed off another 
model ISV?

Tom Faust