No washer fluid for headlights or back window

[jreidX5]

I just bought a 2002 e53 4.4i sport w/premium pkg and cold weather pkg. I've been trying to diagnose why there is no washer fluid pumping through for the headlight washers or the rear window washer. I checked all the fuses and they are good. The windshield washers work fine. When I push the wiper stalk all the way forward and hold it, I don't hear any pump noise but the rear wiper works. Of course I hear pump noise when I run the windshield wipers but even with the headlights on, the headlight washers never activate after 5+ attempts. I even tried the "S" special program wash cycle that activates the windshield washers twice and is supposed to activate the headlight washers.
Is it a relay and if so, where would I find it?
If it is a pump, how do I know which of the three pumps and how do I access them?
I am about to order the Bentley Publishers e53 repair manual but it won't get here for at least a week.

I would appreciate any help and if possible some photos of how to access the various parts to trouble shoot. Thanks!