Diesel Data: Automotive Repair

Test O: The High Beam Indicator Is Never/Always On

PINPOINT TEST O: THE HIGH BEAM INDICATOR IS NEVER/ALWAYS ON


O1-O2:






O2-04:






Normal Operation
When the high beams are turned on, the smart junction box (SJB) sends a signal to the instrument cluster through the communication network to illuminate the high beam indicator.

Possible Causes
- SJB
- instrument cluster