LB7 won't start

[Xcav8R]

So my truck won't turn over. Batteries have over 12 volts each. So story goes like this. I turn key to run a few seconds later dash lights up I have just 9 volts on dash voltmeter. Then a few seconds later I gain a lil more volts. I measured at ignition wires and it is 9.8 volt at red and white stripe wire. Then turn key to start and no click no nothing happens. Glow plugs run there cycle. I changed ignition switch but I failed at diagnosing that as the problem lol. Just wondering if you guys had any thoughts. Thanks

 

[baddaddition]

Check voltage at starter

Sent from a greasy hand under the hood of my buddys truck.

 

[superswamper003]

Could it be the alternator?

 

[02greysixer]

Load test your batteries

Sent from my SAMSUNG-SGH-I337 using Tapatalk

 

[duramax-rob]

how old are the batteries? sounds like what mine did with one dead battery. also make sure the posts and cables are clean.

 

[jkholder09]

Hook a jump box up and ground it on block. If the truck starts you have a bad ground cable

from mobile

 

[Xcav8R]

Thanks for replys will try tomorrow.

 

[Xcav8R]

So unhooked driver side battery and it was corroded plus there was some lead on it that shouldn't of been. Cleaned it up and kaboom it starts. Thanks guys