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Home >> Dodge and Ram >> 2023 >> ProMaster 2500 >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Global Telematics Box Module- DTCS B1401-11 To B1569-11 >> DTC Troubleshooting >> B143D-13 Microphone 2 - Circuit Open >> Possible Causes

Possible Causes

Possible Causes
EMERGENCY MICROPHONE (+/-) CIRCUIT OPEN
MICROPHONE 2 (+/-) 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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