Usage:
STEP 1. Check Locomotive Control Box Diagnostic Lamps
Test Procedure:
Observe the diagnostic lamps visible at the Control box lid.
Expected Results:
A system fault code is displayed by the diagnostic lamps. If more than one fault exists, the faults are displayed consecutively at 5 second intervals. Troubleshoot multiple faults in the order listed below.
STEP 2. Check Connections to Warning Light
Test Procedure:
Troubleshoot Warning Lamp Relay in junction box and wiring from relay contacts to warning light, looking for short circuits or intermittent connections.
Expected Results:
No short circuits or intermittent connections are found.
STEP 3. Check Power Supply to Control Box
Test Procedure:
Stop engine. Disconnect connector J1 from Locomotive Control box. Measure the DC voltage between harness connector J1 pins 8 and 9 while the harness leads are manually shaken.
Expected Results:
The battery voltage applied to the control box is constant and between 64 and 110 volts DC.
