Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2004 Lexus LS 430FACTORY OEM SERVICE PROCEDURE
Electrical Component Locator: Splices
SPLICES LOCATION
| Component | Location |
|---|---|
| B1 | In body harness, at right side of windshield header. See Figure. |
| B2 | In body harness, above center of right front door. See Figure. |
| B3 | In body harness, at right side of luggage compartment. See Figure. |
| B4 | In body harness, at center of rear bumper. See Figure. |
| B5 | In body harness, under front of left front seat. See Figure. |
| B7 | In body harness, under right front seat. See Figure. |
| B8 | In body harness, under left center of rear backrest. See Figure. |
| B10 | In body harness, under right center of rear backrest. See Figure. |
| B11 | In body harness, under right center of right rear backrest. See Figure. |
| B12 | In body harness, near navigation ECU connectors. See Figure. |
| B13 | Rear of luggage compartment. See Figure. |
| B14 (W/O Rear Power Seat) | Center of rear seat. See Figure. |
| B14 (W/Rear Power Seat) | Center of rear seat. See Figure. |
| B15 | Center of rear seat. See Figure. |
| E1 | In engine harness, under ECU box. See Figure. |
| E2 | In engine harness, near ECU box. See Figure. |
| E3 | In engine harness, behind left headlight. See Figure. |
| E4 | In engine harness, behind right headlight. See Figure. |
| E5 | In engine harness, at center of right inner fender panel. See Figure. |
| E6 | In engine harness, behind left headlight. See Figure. |
| E7 | In engine harness, under engine room No. 2 R/B. See Figure. |
| E8 | In engine harness, under ECU box. See Figure. |
| E9 | In engine harness, under engine room No. 1 J/B. See Figure. |
| E10 | In engine harness, near front of battery. See Figure. |
| E11 | In engine harness, at top center of right cylinder head. See Figure. |
| E12 | In engine harness, at top center rear of engine. See Figure. |
| E13 | In engine harness, at top rear of left cylinder head. See Figure. |
| I1 | In dash harness, behind left side of instrument cluster. See Figure. |
| I2 | In dash harness, behind upper left side of dash. See Figure. |
| I3 | In dash harness, behind center of instrument cluster. See Figure. |
| I4 | In dash harness, behind upper left center console. See Figure. |
| I5 | In dash harness, under left front of center console. See Figure. |
| I6 | In dash harness, behind passenger's side air bag. See Figure. |
| I7 | Right top of dash. See Figure. |
| I8 | Right top of dash. See Figure. |
| I9 | Center of dash. See Figure. |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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