2009 M35 Windows Issue

[HughG]

My 2009 M35 has started having windows issues. Only the drivers' side front works. And the child lock and door lock/unlock on the master windows switch doesn't work either. I replaced the windows master switch, but the replacement switch has the same symptoms. Anyone out there with this experience? I suspect a relay, but which one and why would the drivers front still work? Are they on different relays?

[VStar650CL]

The lock/unlock functions work out of the BCM, but given your problems with the windows too, I'd suspect a wiring or ground problem. Inspect the power connection for the master switch, if you find any blackened female terminals, particularly ground wires, then they're probably the culprit. If not, peel back the accordion rubber on the door and inspect the harness for cracked insulation and broken wires. If that all checks okay, chances are your BCM is going south.