Hi Luis, thank you for answering ........ if that method knew ... what equipment ????? I wanted to know the test form in case the fault indicates that it is the pressure switch and in fact the fault is in the platelet that does not interpret the pressure switch signal well, and in case of not having an extra pressure switch to test ?? ??? I do not know if I explain myself ..... how do I do this test no matter what kind of equipment I try to get it but would you indicate the form please ?????