vauxhall zafira not start

[big len]

hi new to piston heads have we any Vauxhall wizards on here I have a 2004 Zafira with an electrical problem I have changed the crank sensor engine ECU key and transponder but still no joy I think the problem is something to do with the engine management light as it doesn't come on at all if i plug a obd reader in it says cannot connect so cannot get any readings any help please

[big len]

had both proper pc one and a cheap one had a lad out he seemed to no his job with proper Vauxhall diagnostics but nothing like i say

[big len]

the car did start but cut out and did not start sometimes so i changed the crank sensor but made no difference.so had a mate put his obd on it still nothing.was told engine ecu what has been changed with the key and transponder

[big len]

all the dash lights come one apart from engine management light

[big len]

oh dear sounds like its going to the scrap yard but why is the engine management light not coming on i hate Vauxhalls

[big len]

the problem started when the light did not come on before it was on so not the bulb