So this wire with plug was dangling between the rear driver wheel and the rear diff - it’s been off a while as the pins are corroded - got no faults or anything but I can’t find what it may be for - any ideas?

Click image to enlarge

Electronic rear diff?

As you currently report no indicated faults - Try every single feature your car has, to see if one feature is not working, some items may not indicate a fault when disconnected, but may indicate a fault when is does not respond to signals when operated. ie like locking diff as in Kevinp's post.

Last edited by Merchy on 23rd Apr 2021 1:12pm. Edited 1 time in total

FBH fuel pump ? .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

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kevinp wrote:

Electronic rear diff?

Joe90 wrote:

FBH fuel pump ?

As a suggestion, FBH was standard on diesel models and an option on petrol models. I would think that the same loom was used for all models as being easier. I think it is probably an FBH plug but as yours is supercharged - no FBH. John
2008 Stornoway Grey 3.6 Tdv8 Vogue
2005 TD6 Java Black Vogue - Written off!!
GAP iiD BT
2003 Discovery TD5 Auto, Nanocom Evolution - gone to a new home!
MasseyFerguson 152 - No electronics!! - Sold

That makes sense - thanks Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF