Hey guys, I recently went on a long cross country flight and when I landed I noticed my hour meter (Hobbs) had only rolled over 1.1 hours on about a 3 hour flight. After returning home I assumed the hour meter was bad and pulled it out. Yes I know I can’t install as new one since I’m not a mechanic but I always have someone look over it and sign the books. Nevertheless, I hooked it up to a battery and it worked just fine. Now I assume the oil pressure switch has gone bad, I tested the voltage and the switch only to find .5V. I couldn’t believe the reading since this is a hot circuit always tied to the battery. I checked the fuse mounted on the firewall and it was fine and was getting 13V so that wasnt the problem. The only other thing on the circuit was the old Cessna clock which looking back I did mess with since I got bored on the long flight. After test the voltage on it, it also only read .5V. Does anybody have any suggestions on what to test or what might be wrong?