BMW E34 Blower motor issue

[shogun]

Might be a contact problem. Had a similar problem with my aux fan, turned out that some contacts were oxidized, used contact spray on all connections including the spades of the relays and it worked again.
Pull the control module and check the connectors, spray with contact cleaner/enhancer.

[632 Regal]

[QUOTE=shogun;349993
Pull the control module and check the connectors[/QUOTE]

What and where?