4.4.2 HDX Dashboard Cluster¶
Type: Analog/Digital Hybrid Instrument Cluster
Model: HDX-96J-TJ (1996-03 Jeep TJ, Black Background)
Manufacturer: Dakota Digital
Product Page: HDX-96J-TJ Instrument System
Overview¶
Drop-in replacement for factory TJ gauge cluster. Combines analog gauges with digital message centers for comprehensive vehicle monitoring.
Mounting: Factory TJ dash gauge location (direct bolt-in)
Background: Black or silver alloy (select at purchase)
Analog Gauges¶
| Gauge | Range | Function |
|---|---|---|
| Speedometer | 0-160 MPH | GPS-based (via GPS-50-2 BIM module) |
| Tachometer | 0-8,000 RPM | J1939 CAN from Cummins R2.8 ECM |
| Oil Pressure | 0-80 psi | J1939 CAN from ECM or included sender |
| Water Temp | 100-260°F | J1939 CAN from ECM or included sender |
| Fuel Level | E-F | Factory TJ fuel sender |
| Voltmeter | 9-17 VDC | Direct battery voltage monitoring |
BIM Modules¶
| Module | Data Provided | Notes |
|---|---|---|
| BIM-01-2-J1939 | Tachometer, oil pressure, coolant temp, check engine light | Cummins R2.8 ECM via J1939 CAN |
| GPS-50-2 | Speedometer (10 updates/sec), compass, altimeter, digital clock | GPS-based, eliminates mechanical speed sensor |
| BIM-22-3 | Tire pressure (4 wheels) | Wireless valve stem sensors |
| BIM-17-2 | Compass (8-direction), outside air temperature | Grille-mounted temperature probe |
Lamps & Indicators¶
| Signal Source | Indicator | Notes |
|---|---|---|
| ECM Harness | Check engine light, wait-to-start | Active low / active high signals |
| CT4 Controller | Turn signals (L/R), high beam, brake | Lighting controller outputs |
| Tail Light Circuit | Dash dimming | Variable voltage dimming control |
| Transfer Case Switch | 4WD/4LO indicators | Transfer case position sensing |
Sensors¶
| Sensor | Range | Mounting | Notes |
|---|---|---|---|
| Factory TJ Fuel Sender | E-F | Fuel tank | Variable resistance sender |
| Oil Pressure Sender (included) | 0-80 psi | Engine block | OR use J1939 data from ECM |
| Water Temp Sender (included) | 100-260°F | Engine block | OR use J1939 data from ECM |
See HDX Control Module wiring table for complete signal routing.
Speedometer Required for Legal Operation
Speedometer is legally required for on-road vehicle operation. GPS-50-2 module provides speed data - ensure GPS antenna has clear sky view for reliable operation.
Outstanding Items¶
- Verify oil pressure/temp data available via J1939 from Cummins R2.8
Related Documentation¶
- Dakota Digital System Overview - Complete system architecture
- HDX Control Module - Control box specifications
- BIM-01-2-J1939 - J1939 CAN interface for ECM data
- GPS-50-2 - GPS speedometer module
- BIM-22-3 - TPMS module
- BIM-17-2 - Compass/temp module