CHARGING SYSTEM TEST
- Disconnect harness connector from generator. Turn ignition on. Connect voltmeter between ground and harness connector terminal "L", and terminal "IG" (if used). If reading is zero, locate and repair open between terminal measured and ignition switch.
- Connect generator harness connector. Start engine and increase engine speed to 1500-2000 RPM, with accessories off. Using a voltmeter, measure across battery posts. If reading is greater than 16 volts, replace or repair generator. If reading is less than 16 volts, go to next step.
- Connect an ammeter to generator terminal "B" output terminal. Start engine and increase engine speed to 1500-2000 RPM, with accessories on. Load battery with carbon pile rheostat to obtain maximum amperes output, maintaining battery voltage at or above 13.0 volts.
- If output measured is within 15 amps of rated generator output, generator is okay. If output measured is not within 15 amps of rated output, repair or replace generator. Refer to the «GENERATOR SPECIFICATIONS»(ref-60047-S17678419192001011800000) table.
| Application | Rated Output (Amps) |
|---|
| Manual Transmission (M/T) | (1) 60 |
| Automatic Transmission (A/T) | 75 |
| (1) 75 for models equipped with optional 75-amp generator. |
| (1) | 75 for models equipped with optional 75-amp generator. |
GENERATOR OUTPUT TEST
| WARNING | To avoid a battery explosion, ensure carbon pile rheostat is off before connecting it to battery. |
- Mount generator on test stand. Ensure ground polarity of generator and battery are the same. Connect generator to a fully charged 12-volt battery. Connect voltmeter, ammeter, carbon pile (in OFF position) and 30-500 ohm resistor between battery and generator terminal "L". (Scheme 2)
- Slowly increase generator speed and observe voltmeter reading. If voltage is less than 16 volts, go to next step. If voltage is uncontrolled and increases to more than 16 volts, rotor field is shorted and/or voltage regulator is defective. A shorted rotor field can cause voltage regulator to become defective. Repair as required.
- If voltage is less than 16 volts, increase generator speed and adjust carbon pile to obtain maximum current output. Maintain voltage at 13 volts. If maximum current output is within 15 amps of generator rated output, generator is okay. Refer to the «GENERATOR SPECIFICATIONS»(ref-60047-S17678419192001011800000) table under CHARGING SYSTEM TEST. If maximum current output is not within 15 amps of rated output, repair or replace generator.
Scheme 2
TROUBLE SHOOTING
Note. See TROUBLE SHOOTING - BASIC PROCEDURES article.
