Thanks for the pictures 7vwh, I did consider separating the parts, but in the end I found the perfect location for mine Colin though I do have a multimeter I haven't much of a clue on how to use most of the features on it! I only got it to test my old battery and have since used it about once or twice, but I'm sure it'll be even more useful when I work out how to use it. I've finished my install. Saying that the Stebel Nautilus horn is "loud" is a massive understatement! I'm sure if I left the thing going for more than five seconds it'd melt me. No longer do I have to worry about being heard at national speed limit when some slumbering punk cuts me up on the motorway Thanks again for all the tips and advice guys, you've been a great help as usual