Note: this check is necessary to evaluate the status of the wiring from the output "IN" alternator to positive battery terminal (including fusible link).
1. Before starting the test, check:
- A) Generator installation.
- b) Alternator drive belt tension.
- V) Melting insert.
- G) Absence of extraneous noise from the generator during engine operation.
2. Turn off the ignition (ignition key position "OFF").
3. Disconnect a wire from the negative plug of the storage battery.
4. Disconnect the wire from the terminal "IN" generator and connect an ammeter (DC with measuring range 0 - 100 A) in series between output "IN" and a wire disconnected from the generator. (Connect wire "pluses" ammeter to output "IN" generator and then wire "minus" ammeter to the wire disconnected from the generator.)
Note: It is recommended to use an ammeter with an inductive sensor ("current clamp"), which allows you to measure the current without disconnecting the wire from the output "IN" generator. The use of this type of ammeter allows you to reduce the possible voltage drop due to poor contact of the wire with the output "IN" generator.
5. Connect a digital voltmeter to the terminal "IN" alternator and positive battery terminal. (Connect wire "pluses" voltmeter to output "IN" generator, wire "minus" voltmeter to positive battery terminal).
6. Connect a tachometer.
7. Reconnect the wire to the negative battery terminal.
8. Leave the hood open.
9. Start the engine.
10. Maintaining an engine speed of 2500 rpm, turn on and off the headlights and outdoor lights, thereby adjusting the load on the generator so that the amount of recoil current (shown on the ammeter) would be slightly above 30 A. Gradually reduce the engine speed until the current shown on the ammeter is 30 A. At the same time, read the voltmeter.
Limit value - maximum 0.3 V
Note:
- - If the output power of the generator is high and you cannot reduce the ammeter reading to 30 A by turning on the load, then set the output current of the generator to 40 A.
- - The maximum allowable voltage drop for a 40 A output current is 0.4 V.
11. If the voltmeter readings exceed the maximum permissible value, then there is probably a malfunction in the circuit coming from the terminal "IN" generator. In this case, you should check the circuits between the output "IN" alternator and positive battery terminal (including fusible link). If the wire connection to the alternator output is loose, or if the wire insulation in the harness has changed color due to overheating, repair the problem and recheck.
12. After completing the check, let the engine idle.
13. Turn off all outdoor lights and then turn off "ignition" (key position "OFF").
14. Disconnect a wire from the negative plug of the storage battery.
15. Disconnect the ammeter, voltmeter and tachometer.
16. Connect the standard wire to the output "IN" generator.
17. Connect a wire to the negative plug of the storage battery.