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TM9-2320-360-20-3
Section 4
TROUBLESHOOTING CHARTS
D. CHART -8 - NO “CHECK GAUGES’ LIGHT (CGL) DURING BULB CHECK (Cont’d)
STEP/SEQUENCE
C8-4
Check for Open
l Remove jumper wire.
l Read voltage on vehicle harness
connector, socket B3 (red lead)
to a good ground (black lead).
C 8-5
Check for Battery +
l Turn ignition off.
l Disconnect 5-way power harness
connector at ECM.
l Read voltage on 5-way power
harness connector, socket A (red
lead), to a good ground (black
lead).
l Also read voltage on socket C
(red lead) to a good ground
(black lead).
C8-6
Check for Ground
l Read voltage on 5-way power
harness connector, socket A
(red lead) to socket D (black lead)
l Also read voltage on 5-way power
harness connector, socket C
(#240) (red lead) to socket E
(#150) (black lead).
RESULT
WHAT TO DO NEXT
Less than
11.5 volts.
Ignition line (ckt #439)
open. Repair open.
Then go to C8-30.
Greater than
or equal to 11.5 volts.
Go to C 8-5.
Less than
11.5 volts on either
reading.
Greater than
or equal to 11.5 volts
on both readings.
Either a DDEC circuit
breaker (CB20 or 21) is blown,
and/or battery power line(s)
(ckt #240 or #241) has an
open or short to ground.
Repair problem. Then go
to C8-30.
Go to C 8-6.
Less than
Ground line(s) (ckt #150) has
11.5 volts on
an open. Repair open. Then
either reading.
go to C8-30.
Greater than
Go to C 8-7.
or equal to
11.5 volts on both
readings.
H-87
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