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https://autopapyrus.com/guides/mitsubishi/outlander-xl/interior-fuse-and-relay-junction-block-replacement/
Compiled automatically from service literature and owner experience. Specs are for the typical configuration — check them against your exact car before you start.

Mitsubishi Outlander XL (2nd generation, CW): Interior Fuse and Relay Junction Block Replacement

The interior block is located under the instrument panel on the driver's side behind a protective cover. It holds the fuses and relays for interior circuits, including heated components, brake lights, rear fog light and the wipers. The exact removal procedure for this model is not documented in detail in open sources, so below is the general order used for blocks of this type. The block is almost always replaced after water intrusion, melted terminals or burned traces.

Difficulty: Medium Time: 1.5-3 hours Steps: 12 Tools: Socket set and ratchet (mostly 8 and 10 mm), Phillips and flathead screwdrivers, plastic trim removal tools, flashlight, marker and tape for labeling connectors, phone camera

Part

  • 🔩 Interior junction block (fuse and relay block under the instrument panel on the left side) complete. This is a separate item from the fuses, relays and block cover themselves. Price varies widely with trim level and condition (new or used), so check with your supplier. The exact OE number depends on trim level, so it is safer to match the new block by the number on the housing of the removed block

Step by step

12 steps
  1. Turn off the engine, remove the key and disconnect the negative battery terminal. Wait at least 5-10 minutes so the airbag system capacitors can discharge. If the car has an anti-theft alarm or a radio with a security code, have the code ready.
  2. Make room: slide the driver's seat all the way back and remove the lower trim panel under the steering column. This panel is held by plastic clips and screws; locate them by inspection.
  3. Remove the block's protective cover. Take photos of the fuse and relay layout and of all the harnesses connected to the block.
  4. If needed, remove adjacent trim, such as the side dash trim and the lower air duct. Remove anything extra only after inspection, and do not force or break anything.
  5. Inspect the block to find the cause of the failure: signs of water, corrosion, melted terminals, darkened housing. If the cause is a leak (for example, through a seal or drain), fix it before installing the new block, or the problem will come back.
  6. Label each connector with marker and tape. Disconnect the connectors one at a time: press the latch and pull on the connector body, not on the wires. Some connectors have a lever or screw lock; use it.
  7. Remove the block's mounting bolts or nuts (usually only a few, with small socket sizes) and carefully pull out the block together with the wiring. Tighten moderately on installation, as for small body fasteners, without excessive torque. I could not find an exact value in open data.
  8. Compare the old and new blocks: number of slots, connectors, markings and the number on the housing. Move all relays and fuses to the new block into the same positions, keeping the same ratings.
  9. Install the new block, secure it and connect the connectors strictly according to your labels and photos. Each connector must click into place.
  10. Reconnect the battery. Check the operation of the low and high beams, parking lights, turn signals, brake lights, wipers, heated components, power windows, central locking and the heater blower. Make sure the instrument cluster shows no errors and no unwanted warning lights.
  11. If some functions (locks, light signaling, immobilizer lockout, key) work incorrectly, the block may need to be programmed with Mitsubishi diagnostic equipment. This part is done by a specialist repair shop.
  12. Install the block cover and the removed panels.

Common mistakes and warnings

  • Do not attempt the replacement with the battery connected, as short circuits and damage to the electronics are possible. Work carefully around the airbag wiring. If you have no experience with automotive electrical work, it is better to leave the job to an auto electrician: wiring mistakes can lead to a fire or failure of a safety system.