Looks simple enough to do if you have some electrical knowledge. Basically 12v in and grounds. You'll need the pigtails for the wiper delay module, and I would use a known good working wiper/washer switch. Then you just hook up your 12v battery and plug in the delay box. cheapest route would be using a multimeter with alligator clamps and seeing if theres continuity out of each "pin" or wire. If you're making a large scale to test a bunch of boxes you can use 12v incandescent bulbs or modify a "test light" and use this to visually see if theres voltage running tru.
So basically, knowledge is a bit rusty... but fused 12v to pin 4 (bottom of delay box diagram), pin 2 (bottom of delay box diagram) test light and to ground (visually see if pump works)/multimeter. and basically like that for the motor using a test light or multimeter for readings. and if you use the wiper switch you can easily select the different settings. Using the pigtails with wires and wiper switch makes it relatively plug and play