Good Morning Quiz #2. What? Where and Why? Hint: A lot of $$ for a 3¢ part.

Another quiz for you truckers.

What is it?
Where is it found on the truck?
Why would you want to know?

Man, you'd hate to make a road service call for
this little guy.  But, they do go bad and and the
tool to fix this doesn't cost all that much.

Have at it.
Remember to post your answers here or on
twitter.  My Facebook friends....
I guess you can post there.

As usual, there is no prize for this quiz.
Goldie will just give ya a couple of blast
on her air horn!

later.

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