Hi all. Having a few problems with power on my s2 with cosworth management. Basically can't get no power, lights etc . Battery is brand new, ecu tested working . Now on the cosworth loom I've connected

Red / blue stripe to battery positive
Black to black on ignition switch
Black / red stripe to fuel pump
Not yet connected the green

Turn the key and nothing happens, no lights, horn, dash lights etc , completely dead. With a multimeter i Get 12.5v off the battery, starter, alternator, engine bay earths , but when connecting to the ignition switch its nothing, 0v .

Now the cable made to extend from the cosworth loom to black on the ignition switch is tested working. With this cable, I've simply connected in to the existing cable on the ignition switch rather than just cut and do away with the erst one , if this is right ???

Any ideas on what the problem is ???