Either you have a major power draw (how quickly the headlamps drain the battery) or the starter is bad and drawing too much amperage.
I need you to check something for me. Disconnect the negative battery terminal and fully charge the battery. Once it is charged, with the negative still disconnected, take a multimeter or voltmeter and place the positive lead to the cable and the negative to the battery negative post. Note the battery itself is still disconnected.
Make sure everything electrical is off and the key is off and removed.
Let me know how much of a draw there is with everything off.
Next, connect the battery. Check the battery voltage with your meter right at the battery. It should be 12+v if charged. Have a helper crank the engine. Tell me how low the voltage drops. It should and needs to stay above 9.6V.
Last, with everything off, check how much of a draw the lights place on the battery when turned on.
Note: Before testing, confirm the battery voltage so we know what we are starting with.
Let me know.
Sunday, December 18th, 2022 AT 11:57 AM