ELECTRICAL SYSTEMS TROUBLESHOOTING (CONT)
(Sheet 1 of 1)
PROBLEM NO. 11
ONE WILL NOT COME ON WHEN PANEL TEST SWITCH IS ON
QUESTION OR INSTRUCTION
*Replace bulb (24 volt only ).
Check condition of socket and if bulb is seating correctly. Is
Gain access to rear of instrument panel. Are the wire terminals
properly connected and tight? (NOTE A).
Test individual diode for light which will not come on. Is
Individual diodes are not serviceable, replace diode board
18 gage W wire from diode to lamp socket is open, repair or
*For LOW PRESS BRAKE indicator, test flasher for continuity, see page 2-53. Replace flasher if defective.