Battery warning light stays on or comes on while driving
Headlights dim, flicker, or get brighter and dimmer
Battery keeps dying or needs frequent jump-starts
Electrical accessories work poorly or cut out
Engine cranks slowly or struggles to start
Strange whining, grinding, or squealing noise from the alternator area
Burning smell from overheating wires or alternator
Voltage reading is low or unstable with a multimeter
Car stalls after the battery loses charge
Corroded, loose, or damaged alternator wiring or connections