Quick question chaps

The black box that sits next to the silver relay under the dash, is that part of the system as that still clicks when the ignition is turned on, even when the pump doesnt prime. if so the fault is after the boxes and eith the pump itself is not playing the game or the wiring is knacked.

Any ideas?

dark now so i cant really keep working on it its a pisser only having an hour or so per night to work on it.

on the upside i had a really nice steak pie for tea