Test J: High Beam Indicator Is Never/Always On

Pinpoint Test J: The High Beam Indicator Is Never/Always On





Normal Operation
When the high beams are turned on, the smart junction box (SJB) sends a signal to the instrument cluster through the medium speed controller area network (MS-CAN) to illuminate the high beam indicator.

Possible Causes
- high beam headlamps
- SJB
- instrument cluster