This is just something of a wild guess based on various pics from the troubleshooting manual since I'd rather not go outside and look at mine right now (VX is outside, with a car cover, with a few inches of snow on top, and 14 degrees F).

Anyway, looking at both the Electrical Connector and Wire Harness Routing diagram in the back of the manual and a few other pictures and schematics, it makes it appear as if that may be the wire to connector #E27 which would go to the Crankshaft Position Sensor. A difference I see in the manual though is that is a Red/Yellow wire, and not just Red.

Does your VX turn over but not start? I'd think if the CPS sensor wire was no good I wouldn't think the engine would ever start.