Home >> Lincoln >> 2013 >> MKT Base, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Information Center - Instrumentation, Message Center, And Warning Chimes >> Diagnosis And Testing >> Instrumentation, Message Center and Warning Chimes >> Pinpoint Tests >> Pinpoint Test AO: The Key-In-Ignition Warning Chime Is Inoperative >> Possible Sources