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TM9-2320-360-20-3
Section 4
TROUBLESHOOTING CHARTS
D. CHART -8 - NO “CHECK GAUGES” LIGHT (CGL) DURING BULB CHECK
NOTE - This chart is only to be used if:
1) All basic mechanical checks and physical inspections have been performed with no problem found, and
2) Diagnosis of DDEC-III was started at step START-1, pg H-25 and you have now been referred here.
STEP/SEQUENCE
C8-1
Try to Force CGL on
l Plug in DDR.
l Turn ignition on.
l Select activate outputs
l Activate CGL with DDR.
C8-2
Check for Short
l Remove jumper wire.
l Read voltage on vehicle harness
connector, socket B3 (red lead)
to a good ground (black lead).
C8-3
Bulb Chock
l Remove CGL bulb and check
whether it’s burned out or
otherwise damaged.
RESULT
I
WHAT TO DO NEXT
Go to C 8-2
Go to C 8-4.
Less than
11.5 volts.
DDEC ignition circuit
breaker (CB11) is blown, and/or
ignition line (ckt #439) is open
or shorted to ground. Repair
problem. Then go to C8-30.
Greater than
or equal to 11.5 volts.
Go to C 8-3.
Bulb is
okay.
CGL Driver line (ckt #509) is
open. Repair open. Then go to
C8-30.
Bulb is
not okay.
Replace bulb (para 7-40). Then
go to C8-30.
H-85
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