Battery Discharged

Battery discharged

Check for a poor connection at the battery terminal.

Test the battery Battery Test.

Troubleshoot the alternator and regulator circuit Alternator and Regulator Circuit Troubleshooting.

Check for a broken drive belt:

'08-10 models J35Z2 engine

Except '08-10 models J35Z2 engine Testing and Inspection

Check the drive belt auto-tensioner:

'08-10 models J35Z2 engine

Except '08-10 models J35Z2 engine Testing and Inspection

Check for excessive parasitic electrical current draw Parasitic Draw Check.

'11-12 models J35Z2 engine: Check for a broken over-run alternator decoupler (OAD) pulley Component Tests and General Diagnostics