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.
1998 Lexus LS 400FACTORY OEM SERVICE PROCEDURE
Electrical Component Locator: Switches
SWITCHES
| Component | Component Location |
|---|---|
| A/C Dual Pressure Switch | At upper left radiator support, integral to A/C triple pressure switch. |
| A/C Single Pressure Switch | At upper left radiator support, integral to A/C triple pressure switch. |
| A/C Triple Pressure Switch | At upper left radiator support. See Figure. |
| Brake Fluid Level Warning Switch | In brake fluid reservoir. See Figure. |
| Buckle Switch & Buckle Light (Left/Right) | In respective front seat belt buckle. |
| Engine Coolant Temperature Switch | At front of engine compartment, near right side of radiator support. See Figure. |
| Engine Oil Pressure Switch | At left front corner of engine. See Figure. |
| Engine Oil Level Warning Switch | At front right side of engine. See Figure. |
| Parking Brake Switch | Behind left side of dash. |
| Park/Neutral Position Switch | On transmission. See Figure. |
| Unlock Warning Switch & Key Interlock Solenoid | Behind left side of dash. |
| Washer Level Switch | At left front corner of engine compartment. See Figure. |
Factory Service Tools
Use the Manual With the Right Hardware
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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.