Car not starting just relay clicking .

[Trevor1966]

I have spent loads on this 2013 Zafira with this problem.I have just purchased an Ecu kit and car started again for a day then went back to it and relay clicking again .sometimes you can disconnect battery and reconnect and car will start .Have cleaned all wires going to bcm under bonnet.Has anyone else had the same problem? 

[Vauxhall Owners Club]

I would first test the battery for deep discharge to see if it is still powerful enough to run the car
If okay then move to the earth leads and check their connections from the battery to the chassis earths