Like no waters I am buying a new flush switch for my Thetford toilet, water pump works okay as does the additional small pump under the bowl so, realizing that the flush switch was inoperative I have ordered a new one from Marcle leisure. Looking at the rear of the switch there are amperage markings of, if I remember correctly because I can't find it at present, 1.2, 1.4, 2.2 and 2.4 amps. It is possible, because I did it, to connect this switch the wrong way around, and burn out the 7.5 amp fuse, three times !! Does anyone out there/here know the correct orientation of this switch please, must buy more fuses. Failing this attempt I will have to let some experts tackle the work, I just hate hurting my wallet Thanks, Norman.