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Battery drains overnight?

Tiny
PAULSENJAKE
  • MEMBER
  • 2003 MITSUBISHI GALANT
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 240,000 MILES
I replaced the negative terminal, and it started but now it drains overnight it doesn't lose all the power, but it doesn't have enough to start. I don't know what it could be that we replaced the camshaft sensor a few years back I replaced the alternator and starter.
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Sunday, August 25th, 2024 AT 1:58 PM

8 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
Hi,

My first question would have to be how old is the battery? Have you had it load tested to see if it is maintaining enough cranking amperage?

If you haven't, that is where I recommend starting. Most parts stores will do it free of charge.

Also, there could be a parasitic draw on the battery causing it to drain overnight. Take a look through this link and let me know if it helps:

https://www.2carpros.com/articles/car-battery-dead-overnight

Also, let me know about the condition of the battery and its age as well.

Take care,

Joe
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Sunday, August 25th, 2024 AT 7:38 PM
Tiny
PAULSENJAKE
  • MEMBER
  • 21 POSTS
I charged the battery, and it struggled to start it. It took 3 tries but the battery was full and fine. We had tried replacing the battery and the same issue was there but the battery and alternator tests fine.
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Monday, August 26th, 2024 AT 5:07 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
Hi,

There must be a constant draw on the battery for it to drain overnight. Were you able to check through the link I attached above?

Joe
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Monday, August 26th, 2024 AT 6:01 PM
Tiny
PAULSENJAKE
  • MEMBER
  • 21 POSTS
I wasn't able to find the drain but this wire snapped and I don't know how to replace it. I was trying to replace the terminals.
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Tuesday, August 27th, 2024 AT 2:37 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
Hi,

The wire connector is what broke. Looking at the picture, it appears the wire harness will need replaced for that connection unless there is enough room left on the wire side to drill a hole and mount it.

Let me know.

Joe
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Tuesday, August 27th, 2024 AT 6:53 PM
Tiny
PAULSENJAKE
  • MEMBER
  • 21 POSTS
There isn't enough room.
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Wednesday, August 28th, 2024 AT 11:38 AM
Tiny
PAULSENJAKE
  • MEMBER
  • 21 POSTS
Is there a way to replace the connector?
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Wednesday, August 28th, 2024 AT 11:46 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
Hi,

What I suggest is to visit a local parts store such as AutoZone. They have a section of battery connectors and repair parts. If you can find one that is similar to the one that has broken, you could cut the wires and crimp them onto a new connector. Just make sure all wires are tightly connected in the new connector, and all are making contact.

All you will need is a repair connector that can fit all the wires and the bolt stud you need to attach it to.

Let me know if that helps or if you have other questions.

Take care,

joe
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Wednesday, August 28th, 2024 AT 6:53 PM

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