2001 V-70 Rear Hatch lock inop most of the time

[captoats]

Just got this rig and noticed the rear hatch lock doesn't lock with the rest of the door locks. Took the interior panel off and took a look at the lock itself and it looks fine. Tried to get a Fluke VOM on the connectors to check for a voltage pulse but without a wiring schematic I'm not sure what the readings should be or the color codes. Got to thinking about the relays that work the locks and the flexing of the wires every time the hatch is opened as possibilities. Hoping someone on the board has had the same problem and might shed a little knowledge my way. Anybody got a PDF of the wiring for the central lock system they can send my way?