Cummins QSB3.9-30/QSB4.5-30/QSB5.9-30 Wire Diagram


SKU: TM1399 Category:

Laminated fold-out factory wire diagram for the Cummins QSB3.9-30/QSB4.5-30/QSB5.9-30 engine control system. Includes specifications, & fault code info.

For ECM 3990517


  • ECM pin locations
  • Wire diagram (color-coded)
  • Connectors
  • Each controlled or controlling sensor, etc
  • Cummins responsibility & truck manufacturer responsibility connections
  • Electrical specifications & reading parameters (volts-amps-ohm readings)
  • Fault codes, fault reasons, fault effects

Laminated surface allows for the use of erasable marker to make notes while performing diagnostics which can be erased when finished.


View more Cummins Wire Diagrams


There are no reviews yet.

Be the first to review “Cummins QSB3.9-30/QSB4.5-30/QSB5.9-30 Wire Diagram”

Your email address will not be published. Required fields are marked *