Check the cabin and engine compartment power distribution panels first, using the cover labels to match each slot with its circuit. Verify amperage ratings before replacement, as installing a higher-rated element can damage wiring and connected components.
The interior panel is typically located under the dashboard on the driver side. It controls lighting, audio system, climate controls, and accessory outlets. Each position is numbered, allowing quick identification of the affected circuit when a component stops working.
Under the hood, the main power distribution unit contains higher current protection elements for systems such as cooling fans, ignition, and ABS. These slots use larger ratings, often ranging from 30A to 60A. Always disconnect the battery before handling these parts to avoid short circuits.
Use a multimeter or a test light to confirm failure instead of relying only on visual inspection. A broken internal strip is not always visible, especially in low-light conditions. Testing across terminals ensures accurate diagnosis and prevents unnecessary replacements.
Keep spare elements of common ratings like 10A, 15A, and 20A in the vehicle. This allows immediate restoration of basic functions such as wipers or brake lights without delay. Store them in a dry compartment to avoid corrosion and ensure reliable contact.
2003 Mitsubishi Eclipse Fuse Diagram With Relay Locations and Circuit Details
Locate the engine bay power distribution unit near the battery and use the underside cover chart to match each slot with its circuit before removing anything. Confirm the correct amperage marking on each element to avoid damaging sensitive systems.
The front compartment panel typically contains high-load circuits. These include cooling fans, ignition coils, and ABS control. Ratings often range from 30A to 60A, and relays nearby control switching for these systems.
Key relay positions in the engine compartment include:
- Cooling fan control relay placed near high-current slots
- Fuel pump relay positioned close to injection system protection
- Main ignition relay linked to engine startup circuits
The cabin panel is mounted under the dashboard on the driver side. It handles lower current circuits such as interior lighting, radio, power outlets, and control switches. Slot numbering is printed on the panel frame for quick reference.
Typical cabin slot assignments include:
- 10A slot for interior lights and dashboard illumination
- 15A slot for audio system and accessory sockets
- 20A slot for wiper motor and washer pump
Use a puller tool to remove each protective element without bending terminals. Check continuity with a multimeter rather than relying on visual inspection, as small breaks inside the strip may not be visible.
Relays inside the cabin area control functions like rear defroster and blower motor. These components are usually square modules that can be swapped with identical units for testing.
Disconnect the battery before working on high-current circuits, especially in the engine compartment. Reconnect only after confirming all components are seated correctly and no exposed contacts remain.
Engine bay fuse panel layout with labeled circuits and amperage ratings
Open the engine compartment panel near the battery and read the cover legend to match each slot with its assigned circuit before removal. Stick to the printed amperage values, as higher ratings can overheat wiring and damage modules connected to that line.
The layout groups high-load systems in clearly separated rows. Cooling fans usually occupy 40A–60A positions, while ignition and engine control circuits are commonly protected by 20A–30A elements. ABS and radiator fan circuits are often placed toward the outer edge of the panel for easier access during service checks.
Relays are installed alongside these slots and handle switching for components that draw higher current. Main relay, fuel delivery relay, and fan control relay are positioned close to their corresponding circuits, reducing wiring length and voltage drop. Always reseat each component firmly after inspection to maintain stable electrical contact.