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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 914 (Transfer Case - Mp 3023-NQH) >> Diagnostic Information and Procedures >> DTC B0775 >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The 4 high indicator circuit consists of an indicator lamp feed circuit and an 4 high indicator lamp control circuit. When the 4 high mode has been selected, current is supplied to the 4 high indicator lamp by the interior lights dimming circuit, traveling through the 4 high indicator lamp LED, at which time the transfer case shift control module supplies the ground through the 4 high indicator lamp control circuit.