The fatty does not get much use. so much so that the CTEK trickle charger was on for a couple of weeks recently.

Upon using the car next time I was presented with a wealth of warnings plus a totally dead NSF light cluster. Warnings were no adaptive cruise, no forward alert, bonnet open (it wasn't), coolant low (it wasn't), park brake fault etc plus headlights no longer swivel and no output from any lights / indicators on NSF cluster.

I cleared all codes with a basic reader but they still showed up in the dash afterwards.

Decided to take off battery and fully charge over-night. It charged t 13.1v (which thought was a bit high) but after fitting read 12.4v. Re fitted battery but al codes still showing. Upon ignition cycling once without starting the engine the voltage in the battery fell from 12.4 to 12.3. It remained at 12.3 for a few hours afterwards.

I know multiple errors invariably means new battery but could it also be something else. I will chcek the under arch earths but the range of errors confuses me.

As an aside I also note that my OEM battery is actually made by Excide and I can get a 850CCA 90aH Excide from my local factors for literally half what the main stealers wants!

That car starts and drives perfectly albeit with yellow and red triangles on the dash. Any opinions would be most welcome.

Thanks[/u] 405 AB exec seats Baltic and Cirrus
93 RR Classic efi

Remember it's easier to get forgiveness than permission!

Gone in order:
4.4 TDV8 SE - gone to a good home
93 Classic hard dash Plymouth Blue
03 L322 Oslo Blue
2000 Disco TD5 ES Epsom Green
98 P38 Rioja Red
89 Classic Cairngorm Brown

You should have 2 batteries.....

I swapped mine for Exides and they are an exact fit & easy swap

https://www.fullfatrr.com/forum/topic65160-90.html

Those symptoms especially if the headlight goes are normally attributed to earth point corroded or failed, I had exactly those symptoms a couple of years back.

https://www.fullfatrr.com/forum/topic65812.html

One of the other faults you might get is locked out of the boot and only drivers door unlocking, I have a video of what happened somewhere, i will dig it out

Hi again. Investigated the wheel arch earth points... OSF still perfect.... NSF totally knackered, nut came off in my hand. New rivnut earth point installed and all good.

Thank you very much for the advice.  405 AB exec seats Baltic and Cirrus
93 RR Classic efi

Remember it's easier to get forgiveness than permission!

Gone in order:
4.4 TDV8 SE - gone to a good home
93 Classic hard dash Plymouth Blue
03 L322 Oslo Blue
2000 Disco TD5 ES Epsom Green
98 P38 Rioja Red
89 Classic Cairngorm Brown