If anyone with a working rear wiper has time and wants to help, could I ask you to perform the test on BE-25 for intermittent operation for me and post up your results (specifically see if the voltage rises right away or if it's delayed by 6-10 seconds)? You have to take off the rear hatch handle (2 M8 screws), and pop off the plastic trim piece. Then unscrew 1 M8 screw that holds on the relay and unplug the relay. Then take it to your battery with a multimeter and some test leads and alligator clips. Takes 10-15 minutes.
In the post above, the wiring has me spooked. L-B from the relay has no path to ground unless I plug in BR2 in the quarter panel area. Here's the thing. L-B doesn't run through BR2. It runs through BR1, at which point it also doesn't have a path to ground. I think L-B might be shorting with L possibly in the upper hatch area. But I would like to confirm my relay operation before tearing in that deep.