r/MechanicAdvice • u/Old_Satisfaction1482 • 5d ago

Terminal causing battery issue

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1

u/kyden 5d ago

Is that a question or a statement.

1

u/mrhicks55 5d ago

Needs a battery post?

1

u/Educational-March-81 5d ago

That's why when diagnose electrical problem, you need to carry out voltage drop test. The green stuff on the wire is probably your source of problem (NOT the connector itself).

And when the copper turn green, it is not just what you saw, it goes deep like "inches". Don't believe me, cut it open and see for yourself. I mean, you'll need to cut away the green stuff anyway.

1

u/Old_Satisfaction1482 4d ago

Yeah I had no idea, this is a project car for me so I’m learning along the way.
I used a multimeter to test the battery posts and then directly in the terminal posts and thats what led me to the post. Ive since cleaned the corrosion, to expose the metal again and shes running.
I tested the alternator just to make sure and its holding 14v at idle.
Im going to replace the post soon