TM 9-2320-387-24-l
ELECTRICAL
DIAGNOSTIC FLOWCHART
-
KNOWN INFO
1 OPTIONS
1. LOOK.
2. STEIICE-R TEST 90
(Page 2-507).
NOTHING
WITH THE ROTARY SWITCH
TURNED TO STOP, ARE ALL
CIRCUITS EXCEPT THE LIGHTS
UNPOWERED?
POSSIBLE PROBLEMS
REASON FOR QUESTION
Its important to verify that
there are no shorts which
SHORTS
OPENS
1 OPTIONS
TURN LIGHTS ON AND LOOK
KNOWN INFO
POWER IS OFF WHEN IT
SHOULD BE
DO ANY OF THE LIGHTS WORK
WITH THE ROTARY SWITCH IN
THE STOP POSITION?
REASON FOR QUESTlON
POSSIBLE PROBLEMS
The lights should work with the
rotary switch at STOP. If the
lights work, power is making it
from the batteries through the
PCB to the light circuit.
OPENS
1
KNOWN INFO
T OPTIONS
TURN LIGHTS ON AND LOOK.
DO ALL OF THE LIGHTS WORK
WITH THE ROTARY SWITCH IN
ANY POSITION?
POWER TO THE LIGHT
CIRCUIT IS OK
REASON FOR QUESTION
There may be problems which
only affect one light. rather
than all of them.
POSSIBLE PROBLEMS
tNDtVlDUAL UGHTS MAY
HAVE BURNT BULBS,
BAD WIRES, ETC.
2-76