Switching wiper to negative ground

["barbara laifman" <barbaralaifman@earthlink.net>]

There is one thing I have never gotten around to on my S3 is to hook up the
wipers.  They are not something I ever use.  But, I really ought to get it
around to hooking them up.  The wiper unit is the S3 unit that came on the
SV.  However, other than that and the body, the rest of the car is my former
SV.  So, it is now negative ground.  The S3 was positive ground.  Anyone
know how to hook up the S3 wiper motor for negative ground?

Thanks,
Jay