The wire path is slightly different depending on which engine you have:
c220a - 16-pin back of instrument cluster
c146 - large bulkhead connector near p-brake pedal
c110 - 42-pin connector near DS valve cover (3.0L only)
C139 - 8-pin below master cylinder (2.3L, 4.0L only)
C103 - at sending switch
Color code - Dark Green w/White stripe.