I have a Toyota 20 62-4fg20, wondering where the fuses are on this lift truck. I'm not sure if I am having firing problems or lack of propane. Hard to start, when it does only runs for 2 mins tops then will not start for a hr or so. Tried giving it a shot of brake cleaner in breather it started, but not for long, how can I test to see if the propane is leaving the regulator. From what I understand only 2psi from regulator to engine.