2011 Grand Cherokee won’t start

[Skawry]

So the car won’t start by itself but will start on a jump, battery is good, lights are bright. When I took it for a spin after jumping it, it ran perfectly as before(it’s getting enough fuel I think). When I turn the key it does a turn then stops. Any ideas? It’s a 2011 overland with the hemi.

[aleekat]

Did you put a voltmeter on the battery when cranking?

[Skawry]

Originally Posted by aleekat

Did you put a voltmeter on the battery when cranking?

I did not yet, your saying I should check to make sure the battery is pushing power when I try to crank it?

[aleekat]

Yes. Without a voltage check you're just guessing. Or take the battery to any parts store for a load test. How old is the battery?

[fredjacksonsan]

Yup, load test the battery. Sounds like it's on its way out.

While you're at the parts store, have them check alternator output as well.

[Skawry]

Originally Posted by aleekat

Yes. Without a voltage check you're just guessing. Or take the battery to any parts store for a load test. How old is the battery?

So I had the battery tested, results came back good. 12 volts. I got a multimeter tested it and got 12 volt, then while I try to crank it the voltage drop to about 10.5, is that normal? Also a more detailed description on what the car is doing, basically when I turn the key I hear the engine crank once and then it quits, it’s not a consistent turn, just once and off(note it’s a push to start)

[aleekat]

Did they do an actual load test or just check battery voltage? 12v static is low. I would check all cables. Clean and tight. At the starter also. Measure voltage at the starter. You may have a voltage drop at the starter.

[Skawry]

Originally Posted by aleekat

Did they do an actual load test or just check battery voltage? 12v static is low. I would check all cables. Clean and tight. At the starter also. Measure voltage at the starter. You may have a voltage drop at the starter.

How do you check starter voltage?

[aleekat]

Originally Posted by Skawry

How do you check starter voltage?

Numerous YouTube videos. You never said how old is the battery?

[Skawry]

Originally Posted by aleekat

Numerous YouTube videos. You never said how old is the battery?

The battery is new, I did the starter circuit test and got around 3 volt’s resistance on all three power, s terminal, and ground. What’s the next step?

[aleekat]

Double check all cable connections. Clean and tight. Check all grounds.
http://www.aa1car.com/library/voltage_drop_testing.htm

[Skawry]

Originally Posted by aleekat

Double check all cable connections. Clean and tight. Check all grounds.
http://www.aa1car.com/library/voltage_drop_testing.htm

I check the the battery connections didn’t see any signs of corrosion, went over everything with a wire brush just to be sure, connections are tight. I checked the starter by touching one end of my multimeter to the ,power circuit and positive battery post, s terminal to positive, ground to negative, all on dcv.

[aleekat]

Originally Posted by Skawry

The battery is new, I did the starter circuit test and got around 3 volt’s resistance on all three power, s terminal, and ground. What’s the next step?

Confusing. 3v resistance? Do you have 12v getting to the starter via battery positive cable?

[Skawry]

I’ve decided to go to my mechanic and have him take a look at it, I’ll make sure to come back to this thread and tell you what he finds. That being said I really appreciate your help I’ve definitely learned a few things

[aleekat]

Ok. I wondering if your starter is bad?