From beginner to expert, IDNLearn.com has answers for everyone. Discover prompt and accurate answers from our community of experienced professionals.
Answer:
Connect the test light in series with the negative post, and start pulling feed wires. The first to check is the heavy charging wire from the alternator. A bad or leaky diode in an alternator is a very common source of overnight battery drain. Connect wires one at a time to see what lead is drawing current.