LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Hummer >> 2010 >> H3T Alpha >> Repair and Diagnosis >> External Pages >> Different car >> Section 1112 (Mirror Systems) >> Diagnostic Information and Procedures >> DTC B1640 >> Circuit/System Verification
October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Circuit/System Verification

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON, press the rear window defogger switch. The rear window defogger and both heated mirrors should become warm.