Greetings - Newbie here to the forum on my second Westminster. This vehicle was an auction find priced within my soon to beDivorced budget. The Water line covered the bottom of her seats and when I supplied a new battery, she was none to happy - quite the Christmas tree. However, she's cleaning up nicely and we'll sort things out.

The current challenge is when I do connect the battery the alarm goes off. So I put key in ignition to turn it off, then get out of the vehicle again and put the key in the door and turn twice - nothing happens. I pull each locked door handle twice - nothing happens. The door lock button on the dash - nothing. The remote unlock - nothing. Windows and seats do not function and the clock turns round constantly when power is present.

My unprofessional diagnosis is that I clearly have a BCM issue - mostly because of the spinning clock windows remote + door lock issues (BTW - I am open to other ideas.) My question to those who come before me is this: I see a lot of BCM's out there on the interwebs /eBay etc. I am 100% convinced I need to suck it up and acquire a Gap Diagnostics tool however what about the BCM Unit itself. Can I purchase another for 4.2 Supercharged model and just replace and reprogram?

I expect I'll be spending a great deal of time here so thank you for reading and let me know if I'm doing it wrong.

Looking forward to your thoughts
- G[/b]

When I drowned mine in a river in Wales it did similar things, I took the BECM apart and scrubbed it with a toothbrush and deionised water, then rinsed it with contact cleaner, it then worked fine...

It is the contaminants in water that dry onto the PCB and create their own pathways for electricity to flow that causes problems......

Worth a try before spending money...  Pete

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2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-