The second-generation Toyota Windom (V20) is identical to its sister model, the Lexus ES 300. Its exterior design evolves from the first generation, retaining its sleek proportions while increasing slightly in dimension. Refined lighting design and sharper body lines give it a more athletic, balanced stance. This guide provides detailed fuse box diagrams and relay panel layouts for the second-generation Toyota Windom (chassis codes MCV20, MCV21; K platform) and Lexus ES 300 / ES 250, covering model years 1996, 1997, 1998, 1999, 2000, and 2001.
Below you will find the locations, diagrams, and photos of the power distribution centers. The fuse for the “Cigarette Lighter” is highlighted in bold.
Engine Compartment
The engine compartment contains one main fuse box and two auxiliary relay boxes.
Main Fuse Box
Main fuse box location and access.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | A |
| 1 | Air-Fuel Ratio Sensor Heater — A/F HTR | 25 |
| 2 | Not used | |
| 3 | Air Conditioning System — A/C | 10 |
| 4 | Spare fuse | 10 |
| 5 | Spare fuse | 15 |
| 6 | Spare fuse | 30 |
| 7 | Condenser Cooling Fan — CDS | 30 |
| 8 | Radiator Cooling Fan — RDI | 30 |
| 9 | Charging System Voltage Sensing — ALT-S | 5 |
| 10 | 1996–1999: Right Headlamp High Beam — HEAD RH HI | 15 |
| 2000–2001: Right Headlamp High Beam — HEAD RH HI | 20 | |
| 11 | Electronic Fuel Injection System — EFI | 15 |
| 12 | Horn, Theft-Deterrent System | 10 |
| 13 | 1996–1999: Hazard Warning Flashers | 10 |
| 2000–2001: Hazard Warning Flashers | 15 | |
| 14 | AM2 Power Supply — Instrument cluster, SRS airbags, seat belt pretensioners, EFI system, IGN & STARTER fuses | 30 |
| 15 | Cellular Telephone — TEL | 5 |
| 16 | 1996–1999: Left Headlamp — HEAD (LH) | 15 |
| 2000–2001: Left Headlamp — HEAD (LH) | 20 | |
| 17 | Audio System — RADIO 1 | 20 |
| 18 | Spare fuse | - |
| 19 | 1996–1998: Power Supply for HEAD (RH-HI) & HEAD (RH-LO) fuses | 40 |
| 20 | Theft-deterrent alarm, daytime running lights, clock, ignition switch light, keyless remote entry, interior dome lamp, luggage compartment light, sunroof, map lights, central power door locks, vanity mirror lights, door courtesy lights — DOME | 7.5 |
| 21 | 1996–1997: Cruise control, Anti-lock Braking System (ABS), SRS airbags — ECU-B | 7.5 |
| 1998–2001: Cruise control, Anti-lock Braking System (ABS), SRS airbags, seat belt pretensioners — ECU-B | 10 | |
| 22 | Alternator Power Line — ALT (Power supply for RDI & CDS fuses) | 100 |
| 23 | Not used | |
| 24 | Power Supply for AM1 & A/C (HTR) fuses | 50 |
| 25 | T-STK / CDS No. 2 | 30 |
| Relay Positions & Functions | ||
| R1 | A/C Compressor Magnetic Clutch Relay | |
| R2 | Fuel Pump Relay (Circuit Opening Relay) — Toyota Windom | |
| R3 | Cooling Fan Relay No. 2 / No. 3 | |
| R4 | ||
| R5 | A/C Fan Relay | |
| R6 | Main Relay | |
| R7 | EFI Main Relay | |
| R8 | Headlamp Relay | |
| R9 | Starter Relay | |
| R10 | Horn Relay | |
| R11 | Cooling Fan Relay No. 1 | |
Auxiliary Relay Box No. 1
Diagram.
|
||
| 1 | Not used | - |
| 2 | Daytime Running Lights — DRL | 5 |
| 3 | Left Headlamp Low Beam — HEAD LH-LO | 10 |
| 4 | Right Headlamp Low Beam — HEAD RH-LO | 10 |
| R1 | Headlamp Dimmer Relay | - |
| R2 | Daytime Running Light (DRL) Relay | - |
| R3 | Air-Fuel Ratio Sensor Heater Relay | - |
Auxiliary Relay Box No. 2
General location view.
| Diagram | ||
|---|---|---|
|
||
| 1 | Anti-lock Braking System — ABS | 60 |
| R1 | ABS Pump Motor Relay | - |
| R2 | ABS Solenoid Relay | - |
Passenger Compartment
General passenger compartment electrical component layout (Left-Hand Drive models shown).
|
|
| No. | Component |
| 1 | Instrument Panel Fuse Box |
| 2 | Integration Relay |
| 3 | Turn Signal / Hazard Flasher Relay |
| 4 | Front Fog Lamp Relay |
| 5 | Cruise Control ECU |
| 6 | Adaptive Variable Suspension (AVS) Control ECU |
| 7 | Theft-Deterrent Control Module |
| 8 | A/C Control Assembly / ECU |
| 9 | ABS ECU or ABS & Traction Control (TRAC) ECU |
| 10 | Audio Stereo Amplifier |
| 11 | Engine Control Module (ECM / Engine ECU) |
| 12 | Wireless Door Lock / Central Locking ECU |
| 13 | Shift Lock Control ECU |
| 14 | SRS Airbag Center Sensor Assembly |
| 15 | Daytime Running Light (DRL) Relay |
Fuse Box
On Right-Hand Drive (RHD) models, located on the right driver side behind the instrument panel lower coin tray. On Left-Hand Drive (LHD) models, located on the left driver side behind the lower dashboard access panel.
Representative view shown below.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | A |
| 1 | Seat Heaters — SEAT-HEATER | 20 |
| 2 | Air Conditioning, Rear Defogger, Starting System | 10 |
| 3 | Instrument cluster, reverse lights, cruise control, charging system, daytime running lights, traction control, power windows, warning buzzer, service indicators — GAUGE | 10 |
| 4 | 1996–1998: Windshield Wiper and Washer — WIPER | 20 |
| 1999–2001: Windshield Wiper and Washer — WIPER | 25 | |
| 5 | Heated Outside Mirrors — MIR HTR | 10 |
| 6 | Cruise control, Anti-lock Braking System (ABS), power antenna, SRS airbags, seat belt pretensioners, theft-deterrent system, shift lock, traction control, DRL, keyless entry system, EFI — ECU-IG | 15 |
| 7 | Instrument cluster, charging system, SRS airbags, EFI, seat belt pretensioners — IGN | 5 |
| 8 | Stop lights, high-mount stop light, cruise control, ABS, EFI, shift lock system — STOP | 15 |
| 9 | Parking lights, license plate lights, tail lights, DRL, instrument panel illumination — TAIL | 10 |
| 10 | POWER OUTLET — Auxiliary 12V Power Outlet | 15 |
| 11 | OBD-II On-Board Diagnostic Connector — OBD | 7.5 |
| 12 | Front Fog Lights — FOG | 15 |
| 13 | Instrument cluster, EFI system — STARTER | 5 |
| 14 | Central power door locks, theft-deterrent system, power fuel door release — DOOR | 25 |
| 15 | Instrument cluster, audio system, cigarette lighter, glove box light, instrument panel lighting, clock, service indicators, A/C control unit lighting, ashtray light, hazard warning flashers, DRL, seat heater ECU, rear defogger relay, ECT ECU | 7.5 |
| 16 | Turn Signal Lights / Flasher — TURN | 7.5 |
| 17 | Audio System, Power Antenna — RAD2 | 7.5 |
| 18 | Toyota Windom V20 / Lexus ES 250 / ES 300 Cigarette Lighter Fuse (CIG) — Power mirrors, shift lock, theft-deterrent system, central locking, SRS airbags, seat belt pretensioners, heated mirrors, A/C control unit | 15 |
| 19 | Noise Filter | |
| 20 | ||
| 21 | Rear Window Defogger — DEF | 40 |
| 22 | Power Windows, Power Seats, Power Sunroof — PWR | 30 |
| 23 | AM1 — 1996–1999: Headlight Washers | 40 |
| AM1 — 2000–2001: Power Windows, Power Seats, Power Sunroof | 40 | |
| Additional relays located on the rear of the fuse panel: | ||
|
||
| R1 | Power Relay (Power Windows, Sunroof, Power Seats) | |
| R2 | Rear Window Defogger Relay | |
| R3 | Tail Light / Parking Light Relay | |
| R4 | Integration Relay | |
Body Electrical Component Locations
Component locations:
- Sunroof Relay & Control ECU,
- Side Airbag Sensor (Right),
- Power Antenna Control Module,
- Side Airbag Sensor (Left),
- Lamp Failure Sensor Module