Seem to be missing the rubber Gromet the hold the antena mast from touching the metal body. Is there a part number for this piece.

Is there a source of a schematic for my 89 XJS and what dealer will be able to handle my needs. I live in Pennsylvanai, USA

 

Ya they dry out and fall apart when they get old.

Here's your diagram showing the part (this site has many) Electric Aerial and Fixings - Parts For XJS from (V)139052 to (V)179736 | Jaguar Classic Parts UK

and I recently bought the grommet from Welsh Enterprises, Inc - Jaguar XJS Body Fittings Bonnet (Hood) Area Parts in Ohio. They have been good to me over the years, know their Jags, and may have used parts in some cases.

 

Perfect, thanks Greg