TM 10-3930-641-20
ELECTRICAL SYSTEMS TROUBLESHOOTING (CONT)
(Sheet 3 of 3)
PROBLEM NO. 12 (CONT)
ANSWER
REMARKS
YES
NO
STEP
QUESTION OR INSTRUCTION
8
Place PANEL TEST switch in up, ON, position. Is voltage
9
7
present at PANEL TEST switch terminal 5 where BK ground
wire connects?
Turn POWER switch to OFF. Replace PANEL TEST switch.
8
NOTE 3.
--
--
B ground wire from PANEL TEST switch to cab ground is
9
open. Repair/replace. NOTES 2 and 3.
11
12
Is voltage present at diode board assembly (LHIP) terminal
10
where BK/Y wire connects?
16 gage BK/Y wire from diode board assembly to PANEL
11
TEST switch is open. NOTES 2 and 3.
--
--
Replace diode board assembly. NOTE 3.
12
End
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