I wanted to post this in case someone needed it they would be able to find it easler using the search option. I had help from Mike E.
Below is the address of where to get replacement parts for our Autowatch 160li alarm system.
http://abacuscaralarms.co.uk/store/view_product.php?product=178004

By the way my security horn was melted.It is in the path of any spilled brake fluid,thats what got mine.

Rick