K 2500 Truck 4WD V8-6.5L DSL Turbo VIN S (1998)
No Audible Warning Alarm Functions
The Overspeed Warning Alarm Is Inoperative
Troubleshooting Hints
1. CHECK that GAUGES Fuse 4, ILLUM Fuse 14, and STOP/HAZ Fuse 1 are not open. If fuse(s) is open, LOCATE and REPAIR source of
overload, and REPLACE fuse(s).
2. CHECK that Grounds G103, G104, and G200 are clean and tight.
3. CHECK Fasten Safety Belts Indicator for an open filament.
4. CHECK that Audio Alarm Module is securely mounted in Convenience Center.
5. CHECK that the LF Door Jamb Switch operates freely.
6. If the Lamps-On Warning Alarm is inoperative, CHECK that the Panel Dimmer Switch is not in the fully dim position.
7. If the Fasten Safety Belts Warning Alarm remains present after 5 seconds, the Audio Alarm Module may have failed.
8. Failure of two of the three alarm functions may indicate Audio Alarm Module failure.
9. REFER to Instrument Panel Dimming for diagnosis of the Instrument Panel Dimming System. See: Lighting and Horns
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CHECK for a broken (or partially broken) wire inside of the insulation which could cause system malfunction but prove "GOOD" in a
continuity/voltage check with a system disconnected. These Circuits may be intermittent or resistive when loaded, and if possible, should be
checked by monitoring for a voltage drop with the system operational (under load).
^
CHECK for proper installation of aftermarket electronic equipment which may affect the integrity of other systems. Refer to "General
Troubleshooting Procedures,". See: Diagrams/Diagnostic Aids
