Charging System Check (CS-144 Generator)

Charging System Check (CS-144 Generator)

Tools Required
* J 39200 Digital Multimeter
* J 35590 Inductive Current Clamp

1. Disconnect the wire harness from the generator.
2. Set the J 39200 to the DC voltage scale.
3. Connect the J 39200 from ground to the L terminal in the wiring harness.
4. Verify that the voltage is B+.
A reading other than B+ indicates one of the following faults between the terminal and the battery:

* An open circuit
* A high resistance
* A grounded circuit

5. Correct any faults as necessary.
6. Connect the electrical connector to the generator.
7. Turn OFF all of the accessories.
8. Run the engine at 2500 RPM.
9. Measure the voltage across the battery.
If the voltage is above 16 volts, replace the generator.

Caution: Refer to Battery Disconnect Caution in Cautions and Notices

10. Disconnect the negative battery cable. Refer to Negative Battery Cable in Battery Cable Replacement (Negative Cable to Engine) Battery Cable Replacement (Negative Cable to Engine)Battery Cable Replacement (Positive Cable) Service and RepairBattery Cable Replacement (Negative Cable to Frame) Battery Cable Replacement (Negative Cable to Frame).
11. If you use the J 39200 , connect an ammeter in series between the BAT terminal of the generator and the output lead. Ensure that the ammeter is able to measure 115 amps of current.
12. If you use the J 35590 , install the J 35590 around the generator output lead.
13. Connect the negative battery cable. Refer to Negative Battery Cable in Battery Cable Replacement (Negative Cable to Engine) Battery Cable Replacement (Negative Cable to Engine)Battery Cable Replacement (Positive Cable) Service and RepairBattery Cable Replacement (Negative Cable to Frame) Battery Cable Replacement (Negative Cable to Frame).




14. Connect a carbon pile across the battery.
15. Start the engine.
16. Run the engine at 2500 RPM.
17. Turn ON the accessories.
18. Load the battery using a carbon pile in order to obtain maximum amperage.
19. Maintain the voltage at 13 volts or above.
20. If the output is within 15 amperes of the rated output, the generator is working properly.
21. If the output is not within 15 amperes of the rated output, replace the generator.