timed relay

Thanks for all the replies ,They have been more than helpfull ,However our supplier of DEI does not cary this module ,so it looks like I have to make my own ,like the one Hotwaterwizzard posted .Thanks again for all the help ,and if any one else has any other ways to do this ,please keep them comming .

Will either of these relays work for a horn in my car?  Right now I have a horn hooked up to a toggle switch.  It plays for about 6-7 seconds.  I would like to be able to push a button and the horn would play through its sequence and shut off.  With the toggle I have to turn it on, let the horn go through its sequence and then turn it off.  I have a General Lee with the Dixie Horn.

Is there a part number for what you diagramed out or is it something that I would have to make?  I am not that familiar with the symbols on the diagram, but I do have a friend that is an electrician.  Would he be able to decipher it for me?  Sorry, I am still learning this stuff.