Any ideas which is + and - on the back of this 3000 unit. A speaker would be good too
I want to ebay it FWIW but would like to test it to make sure its not pin locked or anything.
Rescued attachment 100_0002s.jpg

The 2nd diagram down looks similar

http://www.davidsonelectronics.co.uk/pinouts.htm

If its is locked send me the serial number off the top, it starts with a M then 5 numbers

eg M66876

Ill send ya the code.

from the top
1 +batt
2 - earth
3 +ign
4 sidelights
5 blank
6 -second earth (some models)
7 blank

speaker side
1 +right
2 - right
3 +left
4 - left

I can send you the multi plugs to fit if you require may help you to sell it.

Nice one, thanks all.
I'd already done a search etc but could'nt find anything that clear, it just kept runing up US stuff