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ISC, ISCe, QSC8.3, ISL, ISLe3, ISLe4 and QSL9 Engines – 013-023   Charging System Indicator

Table of Contents

Initial Check

Initial Check

 TOC

Be sure the correct terminals are being used on the alternator. The R terminal (Delco®) or W terminal (Bosch® K1) provide half of the system voltage and is used to operate accessories such as the tachometer on generator sets.

SMALL | MEDIUM | LARGE


Trouble with the starting system can be indicated by the indicator lamp or ampmeter.

SMALL | MEDIUM | LARGE
   


Check the indicator lamp for normal operation as shown below:

Engine Switch Lamp Ampmeter
Stopped OFF OFF 0
Stopped ON ON –
Running ON OFF +

SMALL | MEDIUM | LARGE
   


If the lamp is on when the switch is OFF and the engine is not running, disconnect the lamp lead at the ignition switch.

  • If the lamp stays on, there is a short to a positive wire.
  • If the lamp goes out, there is a short in the switch.

SMALL | MEDIUM | LARGE
   


If the lamp goes off when the switch is ON and the engine is not running, there can be an open in the circuit.

Check for a blown fuse, a burned out bulb, defective bulb socket, or an open in the No. 1 or D (+) lead circuit between alternator and ignition switch.

SMALL | MEDIUM | LARGE
   


If the lamp is on when the switch is ON and the engine is running, disconnect the lead to the alternator.

  • If the lamp stays on, there is a short to the ground in the lamp circuit.
  • If the lamp goes out, inspect the alternator.

SMALL | MEDIUM | LARGE
Last Modified:  05-Jun-2003
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