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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 274 (Lighting System - DTC B3891 To DTC C0297 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC B3950 or B3951: Rear Turn Signal Circuits >> Diagnostic Fault Information

Diagnostic Fault Information

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Turn Signal Switch Signal - Left 1 1 1 -
Turn Signal Switch Signal - Right 1 1 1 -
Turn Signal Control - Left Front B3948 02 B3948 01, B3948 04 1 -
Turn Signal Control - Left Rear (with TVN) B3950 02 B3950 01, B3950 04 1 -
Turn Signal/Stop Lamp Control - Left Rear (without TVN) B3950 02 B3950 01, B3950 04 1 -
Turn Signal Control - Right Front B3949 02 B3949 01, B3949 04 1 -
Turn Signal Control - Right Rear (with TVN) B3951 02 B3951 01, B3951 04 1 -
Turn Signal/Stop Lamp Control - Right Rear (without TVN) B3951 02 B3951 01, B3951 04 1 -
Turn Signal Lamp - Left Front Ground - 1 - -
Turn Signal Lamp - Right Front Ground - 1 - -
Outside Rearview Mirror - Driver Ground - 1 - -
Outside Rearview Mirror - Passenger Ground - 1 - -
Tail Lamp Assembly - Left Ground - 1 - -
Tail Lamp Assembly - Right Ground - 1 - -
Turn Signal/Multifunction Switch Ground - 1 - -
1. Turn Signal Lamps and/or Indicators Malfunction