Yitzchok 4 #1 Posted May 20 Hi, when its off and i test the battery its like 13v when its running and i test the voltage at the battery the numbers are jumping way up (up and down) (the meter on it is broken so i was using a multimeter but it is a cheap one so idk) it's going all the way up to like 45v what should i do? 1 Share this post Link to post Share on other sites
ineedanother 2,480 #2 Posted May 20 Are you just randomly testing something or is there an issue or problem that you are trying to diagnose? 2 Share this post Link to post Share on other sites
gwest_ca-(File Mod) 12,265 #3 Posted May 20 Some digital multimeters will pick up interference with the engine running so not any help with diagnosis. Most older analog meters with a needle do much better. Perhaps you could borrow one or replace the original with an automotive style the same size. They are not that expensive. 2 Share this post Link to post Share on other sites
Achto 31,886 #4 Posted May 20 8 hours ago, Yitzchok said: i was using a multimeter but it is a cheap one so idk) I you question your meter, test your meter at a known source. This should ALWAYS be practiced when testing AC voltage in your home. Test you car battery for example, should be around 12.5v with the engine off and around 14v with it running. A bad battery in the meter can cause your readings to be off. 1 Share this post Link to post Share on other sites
953 nut 66,440 #5 Posted May 20 7 hours ago, gwest_ca said: digital multimeters will pick up interference with the engine running so not any help with diagnosis. Gary has the problem diagnosed properly. If you place the multimeter on the seat of the tractor it will be far enough from the engine to give a better reading. 1 1 Share this post Link to post Share on other sites
Yitzchok 4 #6 Posted 3 hours ago Two months ago i put in a new battery the last time i used it was two weeks ago. Last week i turned the key and nothing happened i got my (not) trusty (not) good old multimeter and it gave me a reading of 0.02v. Today i tried the multimeter on the car and it gave me good readings i jumped the mower and i tested it and it gave me the same jumpy readings in ac and dc i also tested it by the wires that go to the factory installed analog meter (that i removed because it was broken) to get away from the engine and it gave me the same readings (I'm thinking maybe that's what broke the meter) what should i do before i put in a new battery? Share this post Link to post Share on other sites
