Check the cover label on each electrical panel first to match slot numbers with circuit functions before removing anything, as this avoids cutting power to ignition or lighting circuits unintentionally.
The vehicle uses two main distribution points: one in the front trunk area handling higher loads and another inside the cabin for accessory and control systems. The front section typically includes links rated 30A to 60A for radiator fan, headlight circuits, and charging system, while the interior unit covers 10A to 20A ranges for radio, gauges, and wipers.
Each slot is marked with a number and amperage value, usually printed on the cover or nearby label. Matching these values exactly prevents overheating of wiring or repeated failures under normal load conditions.
Remove the element using a puller or small pliers and inspect the metal strip inside. A visible break or discoloration indicates failure. Replace it with the same rating and test the related system immediately, such as lights, blower motor, or dashboard indicators.
Keep spare links in common ratings like 10A, 15A, 20A, and 30A stored in the glove compartment. This allows quick restoration of critical circuits during roadside issues without delay.
1986 MR2 Fuse Box Diagram with Panel Locations and Circuit Details
Locate the front trunk electrical block first and compare slot numbers with the printed legend to identify each circuit before removing any component.
The front compartment unit contains higher current protection for systems such as radiator fan, headlamps, and charging circuit. These positions typically range from 30A to 60A and are arranged in a compact grid with relays placed alongside for quick access and testing.
Main circuit mapping
- Cooling fan motor 40A–50A
- Headlight system 30A–40A
- Alternator output protection 50A–60A
- Horn and auxiliary circuits 15A–20A
Inside the cabin, a secondary panel manages lower load systems including instrument cluster, radio memory, and wiper controls. These slots are usually rated between 10A and 20A and are labeled clearly on the cover for quick identification.
Inspection steps
- Turn ignition off before access
- Match slot number with legend
- Remove element using puller
- Check metal strip condition
- Install identical rating replacement
Always match amperage and color coding to prevent wiring overheating or repeated failure during normal operation.
After replacement, test related systems such as lighting, cooling fan, and dashboard indicators to confirm stable performance across all connected circuits.
Front trunk fuse box layout with relay positions and circuit mapping
Open the front trunk and locate the main electrical distribution unit near the left side, then use the cover legend to match each slot with its assigned circuit before testing or removal.
The layout groups high-current links in the center while relays are positioned along the edges for quick identification. Typical relay placements include headlight control, radiator fan activation, and horn operation, each aligned with nearby power links rated between 30A and 60A for direct load handling.
Common circuit mapping includes: cooling fan supply near the radiator side, headlamp circuits grouped together for left and right beams, and charging system protection positioned close to the battery feed line. This arrangement reduces wire length and improves reliability under load.
Check each slot by verifying amperage marking and inspecting the internal strip. Replace damaged components with identical ratings, then test systems like lighting and cooling fan engagement to confirm proper operation without voltage drop.