BCM fault on 2007 Tdci Hatch?

[BeeCee]

My friend has a 2007 Focus diesel & has intermittent problem with the indicators, A/c & keyless entry etc. not working. This seems to occur after rain (the vehicle is not garaged). Seems to rectify itself when out in the sun for a while . Seems to point to a moisture problem. Various auto electricians have looked at the vehicle to no avail. I recently checked battery voltage (OK), removed BCM & no moisture present in or around same. No corrosion or damage to connectors or pins in sockets . Replaced BCM & all functions working now except "L" indicator. Would greatly appreciate any advice as to what the cause may be.

[marg99]

similar systems to a bad earth wire
recheck earth wires especially in engine bay

[BeeCee]

Thanks for that marg99, vehicle is down in Melbourne & will check earths & main fuse/s in engine bay next time I am down there. Will also do a basic scan.