Despite battery having been charged it needs jump starting?

OCLAFA

MEMBER
2011 PEUGEOT PARTNER
1.3L
2WD
MANUAL
75,000 MILES

Hello,

Actually, my car is a Peugeot Bipper Tepee, but this model was not in your choice.
Anyway I don't think the problem is related to the model.
I have checked the battery, and it is fully charged, I even changed it with another fully charged battery.
Despite this it needs a jump started with another car otherwise it doesn't crank.
Without this the starter just clicks but doesn't crank.
While jump staring everything works fine.
Why?

Thanks

5 Replies

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

Hi,

I'm not familiar with the vehicle, but I will try my best to help.

When you jump-start the vehicle, how are the jumper cables connected? Do you have a ground going to the engine block or other ground location other than directly to the battery?

Also, try this. Run a new ground between the battery and the engine block. See if that changes something. If you do this, use at least 4-gauge wiring.

One other thought, make sure the battery terminals are clean, tight, and free of corrosion.

Try this and let me know what you find.

Joe

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Saturday, September 23rd, 2023 AT 7:19 PM

OCLAFA

MEMBER
3 POSTS

Hi Joe,

thank you for your reply
When I jump start the vehicle, I connect the red cable onto the battery + and the black cable to a ground/engine.
With this there is no problem with the engine cranks.
However, without jump start the starter just clicks even though the battery is charged 12.6V>.
I don't think the problem is the starter otherwise how can you explain that it cranks when jump stated.
I suspect the battery doesn't have enough power to crank the starter. Do you think that's possible?

When you suggest to "Run a new ground between the battery and the engine block" do you mean link the negative pole of the battery with the ground/engine? And try this without jump start?

Thanks,

Falco

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Sunday, September 24th, 2023 AT 3:39 PM

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

Hi,

The idea that you are using a place on the engine as a ground, and it starts leads me to think the battery ground from the car's battery to the engine block is faulty or there is a weak ground.

Of course, the battery itself may be weak. You could charge it and have it load-tested at a parts store. Most will do it for free. That way we can confirm if it is or isn't the battery.

Additionally, make certain the battery cables are clean and tight. You would be surprised how many times a loose or corroded terminal connection causes this type of issue. Make sure the negative battery cable is in good condition.

Let me know.

Joe

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Sunday, September 24th, 2023 AT 8:11 PM

OCLAFA

MEMBER
3 POSTS

Hi Joe,

Thanks for all the suggestions.
I tried as you suggested, and it didn't work.
So, I took the risk and I bought a new battery and now everything is okay.
In the end was the battery which had lost power.
Thank you for your time.
All the best,
Falco

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Monday, September 25th, 2023 AT 2:40 PM

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

Hi,

Thanks for the update. I'm glad you got it working again. You mentioned above that the battery was checked and good, that's why I didn't recommend testing it.

Regardless, take care and feel free to come back anytime in the future.

Take care,

Joe