Service manual

Body and Accessories Instrument Panel, Gages, and Console 8-57
2006 LSSV Service Manual Supplement
Diagnostic Information and
Procedures
Symptoms – Instrument Panel,
Gages and Console
Important: The following steps must be completed
before using the symptom tables.
Review the system operation in order to familiarize
yourself with the system function. Refer to Charging
System Description and Operation in Engine Electrical.
Visual/Physical Inspection
• Inspect for aftermarket devices which could
affect the operation of the Instrument Cluster
Gages. Refer to Checking Aftermarket
Accessories in Wiring Systems in 2006 C/K
Truck Service Manual.
• Inspect the easily accessible or visible system
components for obvious damage or conditions
which could cause the symptom.
Intermittent
Faulty electrical connections or wiring may be the cause
of intermittent conditions. Refer to Testing for
Intermittent Conditions and Poor Connectionism Wiring
Systems in 2006 C/K Truck Service Manual.
Symptom List
Refer to a symptom diagnostic procedure from the
following list in order to diagnose the symptom:
Gages and Odometer
Voltmeter Gage Inaccurate or Inoperative
Instrument Cluster Dimming
Voltmeter Gage Lamp Inoperative in Lighting Systems
Voltmeter Gage Inaccurate or Inoperative
Step Action Yes No
Schematic Reference: Instrument Cluster Schematics
Connector End View Reference: Instrument Panel, Gages, and Console Connector End Views
1
Did you perform the Diagnostic System Check – Vehicle?
Go to Step 2
Go to Diagnostic
System Check –
Vehicle in Vehicle
DTC Information
in 2006 C/K Truck
Service Manual
2
1. Turn the ignition ON, with the engine OFF.
2. With a DMM, measure the voltage of the 24V battery
and compare the voltage value with the voltmeter gage
display.
Does the voltmeter gage display approximately the same value
as the battery voltage?
Go to 24V
Generator
Inoperative Go to Step 3
3
Test the battery voltage circuit of the voltmeter gage for an
open, for a short to ground, or for a high resistance.
Did you find and correct the condition?
Go to Step 6 Go to Step 4
4
Test the ground circuit 150 of the voltmeter gage for an open or
for a high resistance.
Did you find and correct the condition? Go to Step 6 Go to Step 5
5
Replace the voltmeter gage. Refer to Voltmeter Gage
Replacement.
Did you complete the replacement? Go to Step 6
___
6
Operate the system in order to verify the repair.
Did you correct the condition? System OK Go to Step 2