Its a vaxhall astra van 1.7tdi and its 51 plate

Wiring, schematic, electrical diagrams, fuse diag, error codes etc are basic contents of these online books they sell here on this website www.reliable-store.com I have attached. Must check it out

At www.reliable-store.com get complete guide on whether to repair or
not, service it, and how to repair etc, along with wiring diagrams, electrical diagrams, torque specs, error codes, everything.

check the lock switch at the drivers panel

51 plate astra

huh?

Wires n connections

try here

www.ukbookshelf.co.uk

Each radio has its own , individual code. There is no master code

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First make sure that the code has not been noted somewhere within the car (underneath the ash tray, glove box , rear of sun visor etc) 
 
 
To see if your code is available here  for free then the radio will have to be removed from the dashboard (and if you are lucky, someone may have written the code on the casing ) .
 
If not then POST A BRAND  NEW  QUESTION
 
quoting the radio MAKE+MODEL plus ALL the LETTERS+NUMBERS on ANY LABELS ,BARCODES or STAMPED IN THE METAL CASING
 
Also quote the MAKE of CAR
 
note: Unfortunately not all radios can be decoded using the Serial Number
 
Otherwise try your Main Dealer ...........or take it into a Decode Service who will plug in a laptop to read/recode the memory chip (EEPROM). This takes a few minutes and shouldn`t be too expensive
 

i would hav car computer scanned @ one of those discount places-how is ur cooling system-they also sell service books there mite want to look at troubleshoot page

radio code for peugeot expert 51 plate

Most units are fitted behnd the glove box a couple of screws in it & under it, and the whole thing will come out.

if it has an adjustable sensor then there could be a small hole with a - + a small screw driver turns it up or down, it could well be one that needs programing via software inother words there is a set up sequence which puts the alarm in programing mode...

It depends on the manufacturer. (WHAT ALARM IS IT?)