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 LOCATORMISCELLANEOUS
2004 Lexus IS 300 Base, Standard
Electrical Component Locator: Miscellaneous
2004 Lexus IS 300 Base, StandardSECTION Miscellaneous
MISCELLANEOUS LOCATION
| Component | Location |
|---|---|
| Airbag Squib (Front Passenger Airbag Assembly) | Right side of dashboard. See Figure. |
| Airbag Squib (Steering Wheel Pad) | Center of steering wheel. See Figure. |
| Antenna Amplifier | Behind center of dash. See Figure. |
| Curtain Shield Airbag Squib (Left) | On left "A" pillar. See Figure. |
| Curtain Shield Airbag Squib (Right) | On right "A" pillar. See Figure. |
| Data Link Connector (DLC) No. 3 | Behind lower left side of dash. See Figure. |
| Daytime Running Light Resistor | On right side of engine compartment, on strut tower. See Figure. |
| Diode (A/C) | Behind right end of dash. See Figure. |
| Diode (Fog Light) | Behind left side of dash. See Figure. |
| Diode (Headlight Cleaner) | Behind upper left side of dash. See Figure. |
| Diode (Luggage Compartment Light) (Sedan) | On rear speaker shelf. See Figure. |
| Diode (Luggage Compartment Light) (Wagon) | Above left rear fenderwell. See Figure. |
| Front Window Deicer | Below left side of windshield. See Figure. |
| Fuel Pump Resistor | On left side of engine compartment, on strut tower. See Figure. |
| Generator | On front of engine. See Figure. |
| Horn (Left) | In front of radiator. See Figure. |
| Horn (Right) | In front of radiator. See Figure. |
| Ignition Coil No. 1 | On top of engine. See Figure. |
| Ignition Coil No. 2 | On top of engine. See Figure. |
| Ignition Coil No. 3 | On top of engine. See Figure. |
| Ignitor | On left side of engine compartment, on strut tower. See Figure. |
| Junction Connector No. 5 | Behind left end of dash, above driver side J/B. See Figure. |
| Junction Connector No. 6 | Behind left side of dash, forward of instrument cluster. See Figure. |
| Junction Connector No. 11 (Sedan) | In left front door. See Figure. |
| Junction Connector No. 11 (Wagon) | In left front door. See Figure. |
| Junction Connector No. 12 (Sedan) | Near left "C" pillar. See Figure. |
| Junction Connector No. 13 (Sedan) | Near left "C" pillar. See Figure. |
| Junction Connector No. 13 (Wagon) | Near left "C" pillar. See Figure. |
| Junction Connector No. 14 (Sedan) | On left side of luggage compartment, behind left fenderwell. See Figure. |
| Junction Connector No. 15 (Sedan) | On left side of luggage compartment. See Figure. |
| Junction Connector No. 15 (Wagon) | On left side of luggage compartment. See Figure. |
| Junction Connector No. 16 (Sedan) | Above right rear fenderwell. See Figure. |
| Junction Connector No. 16 (Wagon) | Above right rear fenderwell. See Figure. |
| Junction Connector No. 17 (Wagon) | Above left rear fenderwell. See Figure. |
| Junction Connector No. 18 (Wagon) | In rear of liftgate. See Figure. |
| Junction Connector No. 19 | Right kick panel. See Figure. |
| Junction Connector No. 20 | Below left front seat. See Figure. |
| Junction Connectors No. 1, 2, 3 & 4 | On left side of engine compartment, near engine control module. See Figure. |
| Junction Connectors No. 7, 8, 9 & 10 | Behind upper right side of dash. See Figure. |
| Noise Filter (DEF CDS) | On driver side J/B. See Figure. |
| Noise Filter (Ignition) | On left side of engine. See Figure. |
| Noise Filter (Stop Light) (Sedan) | Above left rear fenderwell. See Figure. |
| Noise Filter (Stop Light) (Wagon) | Above left rear wheelwell. See Figure. |
| Pretensioner (Left) (Wagon) | At base of left "B" pillar. See Figure. |
| Pretensioner (Left) (Sedan) | At left "B" pillar. See Figure. |
| Pretensioner (Right) (Sedan) | At right "B" pillar. See Figure. |
| Pretensioner (Right) (Wagon) | At base of right "B" pillar. See Figure. |
| Rear Window Defogger (Sedan) | In rear window. See Figure. |
| Rear Window Defogger (Wagon) | In rear window. See Figure. |
| Remote Controller (Navigation) | In center console. See Figure. |
| Seat Heater (Driver's Seat) (Sedan) | In driver's seat. See Figure. |
| Seat Heater (Driver's Seat) (Wagon) | In driver's seat. See Figure. |
| Seat Heater (Front Passenger's Seat) (Sedan) | In right front seat. See Figure. |
| Seat Heater (Front Passenger's Seat) (Wagon) | In right front seat. See Figure. |
| Side Air Bag Squib (Left) (Sedan) | Under left front seat. See Figure. |
| Side Air Bag Squib (Left) (Wagon) | Under left front seat. See Figure. |
| Side Air Bag Squib (Right) (Sedan) | Under right front seat. See Figure. |
| Side Air Bag Squib (Right) (Wagon) | Under right front seat. See Figure. |
| Stereo Component Amplifier | Behind right end of dash. See Figure. |
| Theft Deterrent Horn | On left side of engine compartment, on strut tower. See Figure. |
| Transponder Key Amplifier | On steering column, near ignition switch. See Figure. |
RENDER: 1.0x
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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.