Hondaguy1

well here is the jist of the problem. Recently my cousin has had an issue with his car starting. It will start with a jump but not by the battery. Now automatically we assumed battery and bought a new one right away, but it only fixed the problem for one day after. I checked the battery with a voltmeter and it is reading 12.34V not running and 14.39 when running. I cleaned the main ground wire and there is no corrosion on any wire... anyone have an idea of what this could be? thanks in advance!

TATTRAT

It's a Saturn.

Yep4doors

We have a winner.

Did you think to check the alternator? And if its recharging the battery enough?

Hondaguy1

i agree lls im a honda person my self.. but hes on my back about it so im trying to figure it out lol

power2weight

What's the voltage while cranking? Have you done a draw test yet? Your new battery might have been killed do to a draw. Also look at the cables, both ends, and see if they are corroded.

Fabrik8

Time to start looking at voltage drops while trying to start it. You probably need a new cable. A voltmeter will tell you everything you need to know. If its a digital multimeter, it measures differential voltage so you can measure voltage between different ground points, etc...