Thanks for taking the time to update your fuel pump relay thread.... It may just be worth adding that relays can create problems even when they might seem to be operating by CLICKING when power is switched on to them.
Other than the primary mechanical action that creates the click there is the important internal switching action that controls the output task, be that supplying power to the fuel pump, cooling fan, ECU or whatever else.
If the contacts in the switching action have an issue then that can create an intermittent fault, which can make fault finding difficult, for kit can appear operational then fail, and next time you try all seems well... Thus when fault finding if the kit is operating over numerous switching actions... No fault found by the garage. Of course ECU`s evolved in time to have the ability to detect and record intermittent faults.
Many folk who have suffered relay issues now carry a spare, though as has been pointed out, off-shoring industry and counterfeiting parts has created quality issues for many a year since cutting costs became the primary objective ... ..?
The main thing is that you are sorted now and have gained a bit of understanding as to the possible issues.
