buzzing from relay, battery draining

[de4mant]

Hi all back again after a while after having my 2001 hdi 110 off the road for a while however seem to be having a few new issues namely a buzzing sound after turning the car off battery seems to be being drained over night too, the buzzing stops once I remove this relay how ever I have no idea what its for can any body shed some light?

[jonsowman]

I wonder if this is the one?

[steve_earwig]

That doesn't look familiar so I'm guessing semi-mux. The diagram is showing me three relays on the engine fuse panel - air horn (got one of those?), starter inhibitor (I suspect that's for an auto 'box - does it start when the relay is removed?) and fog lights (do they work with the relay removed?) It could be condensation inside it doing that, if you can open it up maybe you can dry it out (if it's not a mass of corrosion...). Failing that buy a new one (motor factor's rather than Pug, unless you have money to burn...)

[de4mant]

Yeah she starts drives and all the essentials seem to be working didn't try fogs to be honest will investigate shortly

[de4mant]

Update fogs work aswell

[steve_earwig]

But what happens if you pull the relay out?

[de4mant]

Sorry to clarify I cant find anything obvious thats not working with it out car starts, drives fine and all seems to be working a ok, somewhat to my concern that said im assuming its a relay, its was pulled from where i was pointing and was buzzing after the engine is killed and key removed from the ignition

[steve_earwig]

That is a bit odd, yes. I know there's a relay something to do with the alarm there on D8s but... no idea. Any chance of reading the codes off of any of the wires going into it?

[de4mant]

if you mean literally straight from the wires i can see a few numbers anything more technical will be a no go lol,
BM04A 10 MB
513
542

were the only numbers or anything i could really make out

[steve_earwig]

BM54 - feed from engine fuse panel
10 MB - no idea
513 - not in database
542 : Headlamp washer pump command

542.JPG

[de4mant]

Well that clears things up lol thank you very much for the effort

[steve_earwig]

Meh, sometimes we get lucky