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Home >> Porsche >> 2017 >> Macan Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 634 (Diagnostic Trouble Code Index DTC: Body Control Module (BCM) -- Discovery/L462) >> Diagnostic Trouble Code Index DTC: Body Control Module (BCM) >> Description And Operation >> DTC B1C90-12: Auxiliary Driving Lamps Relay - Circuit short to battery >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2018 Land Rover Discovery and 2017 Land Rover Discovery. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: This DTC refers to a hardwired driving lamps circuit output from the body control module that can be used for aftermarket/accessory fitting. The circuit is not used on the standard vehicle, but required for aftermarket fitments.
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