The whole setup is a wire with two connectors on one end and the other
about the middle. The other end connects with a white connector
matching the one on your brown wire to the wiring harness in the front
left corner area of the engine bay, looking in from the back.

Each of the two spade connectors connects to a sensor, one by the
flywheel pulley on the left front of the engine, the other to the
sensor you just replaces, then the brown wire goes to the matching
white connector. It's gotta be there somewhere. It comes out from
under the plastic box with the vacuum routing diagram on it. It's part
of a bundle of wires that comes out of there. One of the wires to the
mating connector is yellow, the other is blue.

Good luck.

Jim

On Fri, Aug 29, 2008 at 8:47 AM, Jim Cochran <mxsailor@gmail.com> wrote:
> Hi List,
> Replacing left head on 1986 2.1 and also a new oil pressure sensor (.3
> bar). Since mechanic took off the brown wire, I don't know where it
> leads to- has a slide-on connector at one end, other to sensor. Can't
> find it in Bentley.
> Jim C
>
> 1971 bus
> 1986 Westy
> 1973 Morgan Sloop 33'
> 1987 Morgan Sloop 43'
> http://mxsailor.blogspot.com
>
> I have 2 of everything, but wives.
>