I was told today by the people that changed my oil that my battery was weak. I know how to test it with a multi-meter while cranking the engine. The engine can not start while doing this test and I was wondering if I pull fuse 3 which is labeled injector eng.sub does this disable the injectors so it won't start. I think so but am not sure. It's a 2019 so the battery is 3 years old. I remember when a battery would last @ 5 years.