Access the main control panel under the dashboard on the driver’s side to inspect all connections. Remove the protective cover by releasing the two retaining clips for direct access to all circuits and relays.
Label each lead before detaching any connectors to prevent confusion during reassembly. Note that certain high-amperage circuits are grouped separately near the engine compartment for easier service and protection against overload.
Check each link with a test light or multimeter to confirm continuity before replacing any faulty components. Relays are positioned in the upper row, while smaller protective modules occupy the lower section for easy identification.
Maintain a clean environment around the panel as dust or moisture can trigger false readings or corrosion on terminals. Use dielectric grease on exposed connectors to preserve performance over time.
Record all changes in a service log to track replaced modules and updated circuits. This ensures future troubleshooting is precise and avoids repeated disconnections of correctly functioning leads.
2011 Infiniti EX35 Electrical Unit Layout Guide
Locate the main electrical assembly beneath the driver’s side dashboard to begin inspection. Remove the plastic cover carefully to expose relays and protective circuits for visual assessment.
Organize the panel by function before touching any connections. High-current links are typically positioned near the firewall, while lower-current modules and relays are arranged in the front-facing rows for easier access.
Use a labeling system when disconnecting leads to ensure each wire is reconnected to its original terminal. This prevents accidental miswiring that can damage sensitive components or trigger warning lights.
Perform continuity tests on individual circuits with a multimeter or test light. Check each relay for proper operation and replace any modules that show resistance beyond manufacturer specifications.
Maintain a dry and clean environment around the panel. Dust, moisture, or corrosion on connectors can cause intermittent faults. Apply a thin layer of dielectric grease on exposed terminals to preserve long-term performance.
Identifying Key Circuits and Relay Locations
Start by locating the high-current circuits near the firewall. These typically control the starter, alternator, and main lighting systems. Label each wire with its function before disconnecting to avoid errors during reassembly.
Separate relays by category for easier identification. Powertrain relays are often grouped on the upper left section of the panel, while interior and auxiliary relays sit on the lower right, making access and testing straightforward.
Check for color codes on each lead to distinguish circuits. Red or pink wires generally indicate main power feeds, whereas blue or green often represent control signals or accessory circuits.
Use a multimeter to verify each relay’s operation. Apply 12V across the coil terminals and listen for a clicking sound. Test continuity on the switched terminals to confirm proper function.
Document unusual arrangements for aftermarket components or previous repairs. Relays added for non-standard accessories may be placed outside the original pattern, so noting their position prevents accidental disconnections.
Maintain the panel’s cleanliness and check connectors for corrosion. A small amount of contact cleaner on terminals can restore weak connections and prevent intermittent faults in critical circuits.