Sounds like it's off of a GTE. Do you have a part number?
Here's the wiring diagram for the cruise control system:
http://www.cygnusx1.net/Supra/Librar...x?S=Main&P=100
GTE vacuum lines for CC:
http://www.cygnusx1.net/Media/Supra/.../vacuum_3h.gif
GE vacuum lines (on top):
http://www.cygnusx1.net/Media/Supra/...es/MEL287B.gif
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