Check the indicator lamp for normal operation as shown below.
Switch Off, Lamp O n, Engine Stopped
Disconnect the lamp lead at the ignition switch. If the lamp stays on, there is a short to a positive wire on the
ignition side of the lamp.
If the lamp goes out, there is a short in the switch.
Switch On, Lamp Off, Engine Stopped
This condition can be caused by an open in the circuit. To determine where an open exists. Check for a blown fuse,
a burned out bulb, defective bulb socket, or an open in No. 1 or โ D + โ lead circuit between alternator and ignition
switch.
Switch On, Lamp On, Engine Running
Check the drive belt and alternator pulley to be sure the alternator is rotating.
Disconnect the lead to Terminals No. 1 and No. 2 (Delco) or D + (Bosch K1). If the lamp stays on, there is a short
to ground on the alternator side of the lamp.
If the lamp goes out, replace the alternator.
