Range Rover and Land Rover Discovery suffering from Body Electrical Control Module problems
Due to water ingress down the sills the Range Rover and Land Rover Discovery suffer a lot of problems with the Body Electrical Control Module (BeCM).
Before blaming the BeCM please check the engine compartment fusebox, as it takes all its feeds from here, suffers from corrosion, and thus it has been recommended to be changed every four to five years as a matter of course.
That said we do see a lot of BeCM failures causing headlight, wipers/washers, heated windows, door locks, electric windows, fuel filler cap, sun roof and indicator problems.
BeCM fault symptoms include mis-operation of headlights, door locks, electric windows, fuel filler flap, indicators, sun roof and especially rear wash/wipe. These faults may be intermittent. If you have changed your fusebox and you're still getting problems related to fuse fail codes, this can also be the BeCM.
The advantage of an own unit rebuild is that it avoid programming costs associated with buying a new unit. Also, if you fit a second hand one, the vehicle will then read the mileage of whichever out of the odometer or the BeCM has the highest reading.This is an irreversible process. You will also have issues with door lock reprogramming.