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 MANUALSLEXUS1997ES 300 V6-3.0L (1MZ-FE)REPAIR AND DIAGNOSISLIGHTING AND HORNSINTERIOR LIGHTING MODULETESTING AND INSPECTION
1997 Lexus ES 300 V6-3.0L (1MZ-FE)
Interior Lighting Module: Testing and Inspection
1997 Lexus ES 300 V6-3.0L (1MZ-FE)SECTION Testing and Inspection
LOCATION
INSPECTION
1. INSPECT PERSONAL LIGHT SWITCH CONTINUITY
If continuity is not as specified, replace the light assembly or bulb.
2. INSPECT PERSONAL LIGHT SWITCH CIRCUIT
Disconnect the connector from the switch and inspect the connector on the wire harness side, as shown.
If the circuit is as specified, inspect power source or wire harness.
3. INSPECT INTERIOR LIGHT SWITCH CONTINUITY
If continuity is not as specified, replace the light assembly or bulb.
4. INSPECT INTERIOR LIGHT SWITCH CIRCUIT
Disconnect the connector from the switch and inspect the connector on the wire harness side, as shown.
If the circuit is not as specified, inspect power source or wire harness.
5. INSPECT VANITY LIGHT CONTINUITY
If continuity is not as specified, replace the bulb or vanity light.
6. INSPECT VANITY LIGHT SWITCH CIRCUIT
Disconnect the connector from the switch and inspect the connector on the wire harness side, as shown.
If the circuit is not as specified, inspect power source or wire harness.
7. INSPECT DOOR COURTESY SWITCH CONTINUITY
a. Check that there is continuity between terminals and the switch body with the switch ON (switch pin released: opened door).
b. Check that there is no continuity between terminals and the switch body with the switch OFF (switch pin pushed in: closed doors).
If operation is not as specified, replace the switch.
8. INSPECT DOOR COURTESY SWITCH CIRCUIT
Disconnect the connector from the switch and inspect the connector on the wire harness side, as shown.
If the circuit is not as specified, inspect power source or wire harness.
9. INSPECT LUGGAGE COMPARTMENT DOOR COURTESY SWITCH CONTINUITY
If continuity is not as specified, replace the switch and motor.
10. INSPECT LUGGAGE COMPARTMENT DOOR OPENER MOTOR OPERATION
Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to Body ground, check that the motor operates.
If operation is not as specified, replace the switch and motor.
11. INSPECT LUGGAGE COMPARTMENT DOOR COURTESY SWITCH AND OPENER MOTOR CIRCUIT
Disconnect the connector from the switch and opener motor, inspect the connector on the wire harness side, as shown.
If the circuit is not as specified, inspect power source or wire harness.
12. INSPECT ILLUMINATED ENTRY SYSTEM
(integration relay circuit)
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.