Hyundai GENESIS COUPE BK 2010 Manual page 199

Visually Check Alternator Wiring And Listen For Abnormal Noises
1. Check that the wiring is in good condition.
2. Check that there is no abnormal noise from the alternator while the engine is running.
Check Discharge Warning Light Circuit
1. Warm up the engine and then turn it off.
2. Turn off all accessories.
3. Turn the ignition switch "ON". Check that the discharge warning light is lit.
4. Start the engine. Check that the light is lit.
If the light does not go off as specified, troubleshoot the discharge light circuit.
Voltage Drop Test Of Alternator Output Wire
This test determines whether or not the wiring between the alternator "B" terminal and the battery (+) terminal is good
by the voltage drop method.
Preparation
1. Turn the ignition switch to "OFF".
2. Disconnect the output wire from the alternator "B" terminal. Connect the (+) lead wire of ammeter to the "B" terminal
of alternator and the (-) lead wire of ammeter to the output wire. Connect the (+) lead wire of voltmeter to the "B"
terminal of alternator and the (-) lead wire of voltmeter to the (+) terminal of battery.
Test
1. Start the engine.
2. Turn on the headlamps and blower motor, and set the engine speed until the ammeter indicates 30A.