Check the interior power distribution panel under the dashboard on the driver side and match each slot number with its assigned circuit before replacing any blown link. Use a 10A to 30A range depending on the circuit, with lighting and radio lines typically at lower ratings and systems like cooling fans or rear defogger at higher values.
Locate the engine compartment power center near the battery and verify relay positions tied to ignition, fuel pump, and cooling system. A quick continuity test with a multimeter helps confirm whether a link has failed or if the issue lies deeper in wiring. Never install a higher-rated component than specified, as this can damage wiring harnesses and connected modules.
Cross-check circuit roles such as power windows, instrument cluster, brake lights, and HVAC controls using stamped numbers on the panel cover. These identifiers allow fast isolation of faults, especially when multiple systems lose power at once. Keep a printed reference chart inside the glove compartment for quick access during roadside checks.
1990 Honda Accord Fuse Panel Layout and Circuit Mapping Guide
Locate the interior power distribution block beneath the driver side dashboard and align slot numbers with stamped labels on the cover to identify each circuit before replacing any burned element.
Use amperage ratings marked next to each position, typically ranging from 7.5A for small electronics like the clock and radio memory, up to 30A for high-load components such as blower motor or rear window defroster.
Inspect the engine compartment power center near the battery where primary protection links handle ignition, charging system, and cooling fan circuits; these positions often use larger rated inserts and square relays.
Match slot numbers to systems like headlights, brake lights, horn, and instrument cluster by referencing the molded numbering on the panel housing, which corresponds directly to circuit paths in the vehicle wiring.
Check for shared circuits where a single slot supplies multiple components such as interior lighting and trunk lamp, which can cause multiple failures from one burned link.
Test each suspect position using a multimeter set to continuity mode, confirming whether the metal strip inside the protective element is intact without relying only on visual inspection.
Replace damaged units with identical amperage values and confirm proper seating in the terminal clips to avoid intermittent power loss or overheating at the contact points.
Keep a printed reference chart of slot assignments and relay positions inside the glove compartment to speed up troubleshooting during electrical faults.
Interior Fuse Panel Slot Numbers and Assigned Electrical Circuits
Identify each slot by the molded numbering on the interior panel and match it to its circuit role before removing any protective element.
Use the following slot-to-circuit mapping as a reference for common systems:
- Slot 1 – tail lights and side markers
- Slot 2 – instrument cluster illumination
- Slot 3 – radio memory and clock
- Slot 4 – windshield wiper motor
- Slot 5 – turn signals and hazard lights
- Slot 6 – brake light switch circuit
Continue mapping remaining positions for cabin functions and accessory power lines.
- Slot 7 – power windows main relay feed
- Slot 8 – interior dome lighting and trunk lamp
- Slot 9 – heater and blower motor control
- Slot 10 – rear defogger circuit
- Slot 11 – cigarette lighter and accessory socket
- Slot 12 – central locking system
Check amperage values stamped near each position, with lower ratings such as 7.5A protecting electronics and higher values like 20A–30A assigned to motors and heating elements.
Inspect shared circuits where one slot feeds multiple components, which explains simultaneous failure of systems like interior lights and trunk illumination.
Verify contact integrity by removing each element and checking terminal clips for corrosion or looseness that can interrupt current flow.
Keep a printed slot reference inside the glove compartment to speed up identification during electrical faults.