
Check the main engine compartment distribution unit first, positioned near the battery on the driver side. Identify all numbered slots and note which relays and circuits they control, including headlights, cooling fan, and starter relay circuits.
Verify cabin access unit placement behind the glove compartment. Label each connection to match its function, such as interior lighting, audio system, and climate controls. Use a tester to confirm live circuits before replacing any connectors.
Inspect each slot for corrosion or melted terminals. Replace affected components immediately to prevent shorts that could affect the fuel pump or ignition module. Keep a printed reference of slot numbers and corresponding amperage ratings for quick troubleshooting.
Organize spare relays and connectors in a small kit. Mark each spare with its associated slot number and function. This allows rapid swaps during roadside repairs, particularly for high-draw circuits like cooling fans and ABS modules.
Power Panel Reference and Circuit Guide for Engine and Cabin Systems

Start with the main distribution unit located near the battery. Identify each numbered slot and relay, noting circuits for headlights, ignition, cooling fans, and starter motor. Use a test light to verify active connections before any replacements to prevent shorts.
Check the interior access board behind the glove compartment. Label all terminals and circuits including audio, climate controls, and interior lighting. Maintain a printed chart of slot numbers and corresponding amperages to simplify diagnostics and streamline repairs on high-demand circuits.
Identify Engine Compartment Panel and Slot Functions

Locate the primary distribution unit near the battery. Begin by identifying all numbered slots and their assigned circuits for ignition, cooling fans, fuel pump, and headlights. Mark each connection to avoid confusion during maintenance.
Inspect high-current relays first. These include the starter, fan, and horn relays. Ensure each is seated properly and test continuity with a multimeter before replacing any components.
Slot Layout and Function Reference

- Slot 1: Headlamp circuits
- Slot 2: Front and rear turn signals
- Slot 3: Ignition coil and starter
- Slot 4: Cooling fan motor
- Slot 5: Fuel pump and ECU power
- Slot 6: ABS and brake lights
- Slot 7: Auxiliary circuits such as wipers and horn
Use a printed chart to record amperage ratings for each slot. Verify power with a test light before installing replacements to prevent shorts or blown circuits.
Check for corrosion or loose terminals. Clean contacts with electrical cleaner and tighten connections to maintain consistent power distribution.
Routine Maintenance Tips
- Inspect slots monthly for wear or discoloration
- Replace aged relays before failure occurs
- Keep a copy of the slot assignments inside the engine compartment for quick reference
- Test critical circuits after any repairs to ensure proper function
Label each connection clearly. Use durable markers or tags so anyone performing future maintenance can identify circuits without testing every slot manually.