
Locate the primary service hub behind the driver’s side access panel under the dashboard. This compartment houses all critical circuit protectors and relays, each clearly numbered for rapid identification. For quick troubleshooting, refer to the numeric legend attached to the inner cover; it indicates amperage ratings and component functions.
Inspect each connector for corrosion or loosened terminals before replacing any modules. Components for lighting, ignition, and auxiliary power distribution are organized in sequential rows, allowing precise access without disassembling surrounding panels.
Consult the mapping chart for the auxiliary control modules located near the engine bay. These include high-current protection devices for air conditioning, heating, and starter circuits. Identifying the correct slot prevents accidental interruption of other subsystems and maintains operational safety.
Label wires and terminals when performing maintenance or upgrades. This ensures a clear reference for future repairs and avoids misrouting. Using the integrated schematic, each relay and connector position can be cross-referenced with component function, simplifying diagnostics for both lighting circuits and onboard electronics.
Verify continuity and amperage after replacement using a multimeter. Each slot has a recommended load rating; exceeding this can trigger premature failure or trip multiple circuits. Keeping a log of each change improves reliability during long-term operation and helps identify patterns of repeated faults.
2016 Vehicle Electrical Panel Layout

Check the primary power distribution unit located under the driver’s side dashboard. Each slot is numbered and corresponds to specific circuits such as headlights, horn, and auxiliary power ports. Marking these numbers with a label can prevent accidental misplacement during inspection or replacement.
Under the hood, a secondary control module manages high-amperage connections like the starter, cooling fans, and air conditioning compressor. Fuses here are larger and often color-coded for amperage: red for 10A, blue for 15A, yellow for 20A, and green for 30A. Using a multimeter ensures the correct rating is maintained when swapping components.
Common Slot Assignments

- Slot 1: Cabin lighting and instrument panel indicators
- Slot 5: Radio and infotainment power feed
- Slot 8: Electric mirrors and window motors
- Slot 12: Trailer wiring harness circuits
- Slot 15: Engine control sensors and injectors
For troubleshooting intermittent power loss, remove each connector carefully and inspect for corrosion or loose terminals. Cleaning with contact spray and re-seating ensures proper continuity. Labeling wires with tape or numbered sleeves can simplify future maintenance.
Maintenance Tips

- Always disconnect the negative battery terminal before replacing any protective component.
- Check amperage ratings stamped on each receptacle before installing a new unit.
- Keep a compact tester on hand to verify circuit integrity without removing the panel completely.
- Inspect the enclosure for signs of moisture intrusion, especially after heavy rain or car washes.
- Store spares of frequently used units, such as 10A, 15A, and 20A, for quick replacements.
Mapping circuits onto a printed schematic can save time when diagnosing electrical faults. Highlighting high-priority paths like ignition, fuel pump, and cooling circuits allows faster isolation of issues. Use color-coded markers to match wire colors and amperage ratings for accuracy.
Locating the Electrical Control Panel in a 2016 Van Chassis

Check beneath the dashboard on the driver’s side, near the steering column; a rectangular access cover conceals the panel that regulates all major circuits. Release the latch and pull gently to expose rows of labeled connectors, each corresponding to a specific system such as lighting, ignition, or auxiliary power.
Another access point exists in the engine compartment, on the firewall’s passenger side. It features a snap-on lid marked with miniature icons for rapid identification. Inspect the holder clips before removing the lid to avoid breaking them, and note that the layout inside mirrors the dashboard panel for easier troubleshooting and replacements of blown components.