16.1 MECHANICAL TROUBLESHOOTING (Rev. 2007) All information subject to change without notice. 16-10 From Bulletin 1–MBE 4000–07 6SE412 0702 Copyright © 2007 DETROIT DIESEL CORPORATION Problem—The Battery Charge Indicator Light Does Not Come On When the Engine Is Not Running Cause Remedy The bulb is damaged. Change the bulb. The circuit is broken. Repair the break in the circuit. Problem—The Battery Charge Indicator Light Comes On When the Engine is Running Cause Remedy The poly-V belt is too loose. Check the belt tension; if necessary, have an authorized dealer replace the belt tensioner. The belt tensioner is damaged. Have an authorized dealer replace the belt tensioner.
he poly-V belt is worn or damaged. Replace the belt. The alternator is damaged (has a damaged rectifier or voltage regulator). Have an authorized dealer replace the alternator.