Hello folks.

I'm looking for some help/advice. Crazy electrical problems

I LOVE my 2005 H2 and its served me perfectly the past 3 years until.

A few days ago, the hvac stopped working.

I stopped, checked fuses under bonnet, and found the HVAC fuse blown, replaced it, all fine until a couple of minutes down the road, and the ancillary gauges all dropped to zero.
Speedometer and tach still working.
Simultaneously the radio switched off, and on further inspection I also do not have....
Power door locks
Power windows
Electric sunroof

Also the security light on dash is faintly flickering when the car is running.. All other warning lights are on (abs check engine airbag)

I've checked all fuses under bonnet and in the end of dash.
Checked battery is good, checked batt terminals are tight.

Car starts, and drives fine, lights all work. Tail wiper and screen wipers work fine.

I suspect an earth, but don't know where to start, or worse the bcm

As I'm in the UK, I don't have the luxury of popping to the dealers.....

Any ideas great fully received, or especially some diagram of earth (ground) locations for the stuff that's not working.

Perhaps any way I can isolate the fault to the bcm/tbc whatever you call it.

Cheers!
Ben