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Home >> Chevrolet >> 2002 >> Astro Van Passenger, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 807 (Transfer Case - NVG 136-NP4) >> Diagnostic Information and Procedures >> Service Indicator Inoperative >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2003 GMC Safari and 2003 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.

The SERVICE AWD indicator is located in the instrument cluster. It receives ignitions voltage from a 10 amp gage fuse through the ignition 1 voltage circuit. This circuit also supplies all of the gages with ignition voltage. The transfer case shift control module controls the SERVICE AWD indicator by sending the instrument cluster a Class 2 message. This lamp may be controlled with the scan tool using the instrument cluster output controls.

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