3977 SPN Fault Code

Name:

Cab Dome Light 2

Description:

The cab dome light 2 is the second forwardmost interior light mounted on the ceiling of the cab behind the driver’s shoulders. Typically, the cab dome light 2 will illuminate when a rear passenger door is open.

3977 spn fault code name is Cab Dome Light 2. If you don't take the time to look into 3977 spn fault when it arises, it can add up quickly. One small issue like 3977 can cause a larger component to become damaged without taking the time to investigate. If you suspect your truck is suffering from one of these issues, look into replacing those small components to save money down the road.

Note: The name and description of 3977 code represents text descriptions for faults supported by another coding system and does not necessarily comply with SAE J1939. For a specific engine manufacturer's explanation for codes, please consult the engine's technical manual. See also other spn codes.

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