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.
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HOMESERVICE MANUALSLEXUS2004IS 300 BASE, STANDARDREPAIR AND DIAGNOSISQUICK LOOKUPSELECTRICAL COMPONENT LOCATIONSELECTRICAL COMPONENT LOCATORCONNECTORS
2004 Lexus IS 300 Base, Standard
Electrical Component Locator: Connectors
2004 Lexus IS 300 Base, StandardSECTION Connectors
CONNECTORS LOCATION
| Component | Location |
|---|---|
| BA1 (Sedan) (White, 12 Pin) | At left "B" pillar. See Figure. |
| BA1 (Wagon) (White, 12 Pin) | At left "B" pillar. See Figure. |
| BB1 (Sedan) (White, 12 Pin) | At right "B" pillar. See Figure. |
| BB1 (Wagon) (White, 12 Pin) | At right "B" pillar. See Figure. |
| BC2 (Sedan) (White, 18 Pin) | At right rear floor partition panel. See Figure. |
| BC2 (Wagon) (White, 18 Pin) | At right rear floor partition panel. See Figure. |
| BD1 (Sedan) (White, 3 Pin) | At lower left back panel. See Figure. |
| BD1 (Wagon) (White, 3 Pin) | Left rear corner of vehicle. See Figure. |
| BE1 (Sedan) (Gray, 2 Pin) | Near left license light. See Figure. |
| BF1 (Sedan) (Gray, 2 Pin) | Near right license light. See Figure. |
| BG2 (White, 14 Pin) | Below driver's seat. See Figure. |
| BH1 (White, 6 Pin) | Under right front seat. See Figure. |
| BJ1 (White, 4 Pin) | At upper left side of back panel. See Figure. |
| BJ2 (Blue, 10 Pin) | At upper left side of back panel. See Figure. |
| BK1 (Blue, 12 Pin) | At lower left side of back panel. See Figure. |
| BK2 (White, 3 Pin) | At lower left side of back panel. See Figure. |
| EA1 (Gray, 10 Pin) | Inside ECU box. See Figure. |
| EA2 (Blue, 9 Pin) | Inside ECU box. See Figure. |
| EA3 (White, 11 Pin) | Inside ECU box. See Figure. |
| IA1 (Blue, 20 Pin) | Near left side J/B. See Figure. |
| IA3 (White, 20 Pin) | Near left side J/B. See Figure. |
| IB1 (Gray, 22 Pin) | Near left side J/B. See Figure. |
| IB3 (Gray, 20 Pin) | Near left side J/B. See Figure. |
| IC1 (White, 8 Pin) | Near left side J/B. See Figure. |
| ID2 (White, 17 Pin) | At left kick panel. See Figure. |
| IE1 (White, 5 Pin) | At left side of dash. See Figure. |
| IF1 (White, 14 Pin) | At left side of blower unit. See Figure. |
| IF2 (White, 3 Pin) | At left side of blower unit. See Figure. |
| IG1 (Blue, 17 Pin) | Near right side J/B. See Figure. |
| IG2 (Yellow, 4 Pin) | Near right side J/B. See Figure. |
| IG3 (White, 10 Pin) | Near right side J/B. See Figure. |
| IH1 (White, 22 Pin) | Near right side J/B. See Figure. |
| IH3 (Gray, 14 Pin) | Near right side J/B. See Figure. |
| IH4 (Gray, 14 Pin) | Near right side J/B. See Figure. |
| II1 (White, 20 Pin) | At right kick panel. See Figure. |
| IJ1 (White, 4 Pin) | At left side of dash. See Figure. |
RENDER: 1.0x
NO RELATED
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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.