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Home >> Jeep >> 2024 >> Gladiator Nighthawk, Part Time T/Case Control, Automatic Trans >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Body Control Module (BCM) - DTCS B2121-11 To B2206-00 >> DTC Troubleshooting >> B21F8-13 Exterior Lighting Power Supply Input 1 - Circuit Open >> Possible Causes

Possible Causes

POSSIBLE CAUSES
FUSE OPEN
FUSED B(+) CIRCUIT OPEN OR SHORT TO GROUND
BODY CONTROL MODULE (BCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to:  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE