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the circuit tests normal and the DLIS circuit fuse is open, test the signal circuit 3. Verify the scan tool Key In Ignition Status parameter is Key Out. If not the specified value, test the signal circuit terminal 5 for a short to voltage. If the 4. Install a 3A fused jumper wire between the signal circuit terminal 5 and the B+ circuit terminal 4. Verify the scan tool Key in Ignition Status parameter is Key In. If not the specified value, test the signal circuit for an open/high resistance. If the 5. If all circuits test normal, test or replace the ignition switch. Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Ignition and Start Switch Replacement Control Module References for the BCM replacement, setup, and programming COMPASS MALFUNCTION (MIRROR) Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach. Diagnostic Procedure Instructions provides an overview of each diagnostic category. Circuit/System Description The inside rearview mirror (ISRVM) uses 2 magnetic field sensors for compass direction. One Reference Information Schematic Reference Instrument Cluster Schematics Inside Rearview Mirror Schematics
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Displays and Gages - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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