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Home >> Jeep >> 2021 >> Compass Trailhawk >> Repair and Diagnosis (Single Page) >> General Information >> OEM General Information >> (Global Telematics Box Module - Electrical Diagnostics) >> DTC Troubleshooting >> B143A-13-Microphone 1-Circuit Open >> Possible Causes

Possible Causes

Possible Causes
EMERGENCY MICROPHONE (+/-) CIRCUIT OPEN
MICROPHONE 1 (+/-) CIRCUIT OPEN
REARVIEW MIRROR
RADIO
GLOBAL TELEMATICS BOX MODULE (TBM2)

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

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