RAM 3500 Truck 4WD V10-8.0L VIN W HDC (1999)
Seat Belt Reminder Lamp: Testing and Inspection
Instrument Cluster Part 2
Instrument Cluster
For additional testing and inspection information please refer to Powertrain Management/Computers and Control Systems/ See: Body and Frame/Body
Control Systems/Central Timer Module
Note:
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Before performing this test, see Driver Seat Belt Switch See: Seatbelt Switch in the Diagnosis and Testing section of this group, and
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Instrument Cluster See: Instrument Cluster Part 1 in the Diagnosis and Testing section of Instrument Panel Systems.
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For diagrams, refer to 8W-40 - Instrument Cluster or 8W-45 - Central Timer Module in Vehicle/Diagrams/Electrical/Complete Body and Chassis
Diagrams. See: Diagrams/Electrical Diagrams
WARNING: ON VEHICLES EQUIPPED WITH AIR-BAGS, REFER TO AIR-BAG SYSTEMS BEFORE ATTEMPTING ANY STEERING
WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. FAILURE TO TAKE THE
PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIR-BAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
1. Disconnect and isolate the battery negative cable.
Remove the instrument cluster from the instrument panel.
2. Remove the Central Timer Module (CTM) from its mounting bracket to access the Central Timer Module wire harness connectors. See:
Instrument Panel, Gauges and Warning Indicators/Audible Warning Device Control Module
Unplug the 14-way Central Timer Module wire harness connector.
3. Check for continuity between the chime request circuit cavity of the 14-way Central Timer Module wire harness connector and a good ground.
There should be no continuity.
If OK, go to Step 4.
If not OK, repair the short circuit as required.
4. Check for continuity between the chime request circuit cavities of the 14-way Central Timer Module wire harness connector and the instrument
cluster wire harness connector (connector B).
There should be continuity.
If OK, test the Central Timer Module. See: Instrument Panel, Gauges and Warning Indicators/Audible Warning Device Control
Module/Testing and Inspection
If not OK, repair the open circuit as required.
