As the title says this csr won't start. I had initially had trouble starting it, it would take a few tries to start it. I had tested the alternator while it was iddling and it wasn't putting out enough juice so I replaced it. Now when I try to start it the engine tries to crank and it cranks just barely. I've tested the battery and it's full. The dash also has some warning lights coming on that were coming on before I replaced the alternator. Does anyone have any idea what this could be?

There is also a check engine light that comes on when you first turn the key

 

How did you check the battery?

 

I used a load tester

 

What were the results? Did it hold above 10 volts at 250 amps?

 

When you first turn the key to the on position, the ECU does a self check routine. It turns on all the warning lights for a moment and if it checks out then the light goes out. It also turns ion the fuel pump for two seconds to prime the fuel rail. So, would suggest to listen for the fuel pump prime. Hmm, engine barely cranks?? Most people immediately go to check out the battery. If that checks out fine then it is time to check wiring and connections. Make sure the connections are good. Check under the insulation for corrosion. Good grounds?? And if everything checks out ok then the starter becomes suspect. Good luck