by Ian Linden » Sun Mar 15, 2015 10:34
Hi Avril,
I take it you mean the rear window? The high pitched noise is a warning annunciator to tell you it is not locked in either the up or down position. The reason it will not lock down is probably a mechanical problem - the central console and the "parcel shelf" moulding need to be removed to gain access to see what the problem is.
If the problem is with the release control, you may find you can overcome it by trying to press the window down whilst holding the release up - if that works, it may only need some lubrication, but you will have to gain access to do that anyway.
For a view of the innards, see pages 9-13 and 9-14 of the online Service Manual, and Figure 83 of the EA11R Parts Catalog.
SCORE Treasurer & Membership Secretary