[Bosstang]

I have just had to replace the heater matrix on my 2.0T V40. As I am sure you all know this means removing the entire dashboard and heater box.
I worked my way through all this, replace a leaky matrix and methodically re-assembled everything.
Re-connect the battery and turned the key, engine fires up and runs smooth, heater and climate control seem just fine, no leaks. Then I notice the left hand indicators are on, not flashing but on solid. play with the lights and indicator stalk and the left hand stays on along with the headlamps and the tail lamps in the hatch but not the ones in the car body. The gauges in the dash don't work either nor do any of the warning lights, unless you pull the head lamp flash lever then some warning lights come on and the led display comes on for a minute or so then goes off again.
Is this a failed CEM? I have checked I have plugged everything back in correctly, even sprayed with contact cleaner.