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.
2003 Lexus SC 430FACTORY OEM SERVICE PROCEDURE
Lighting System: Inspection
WARNING: This page is about a different car, the 2004 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.
- MAP LAMP ASSY
- Inspect map light assy continuity.
- Check that the continuity between terminals at each switch position, as shown in CONTINUITY TABLE .
CONTINUITY TABLESwitch operation Tester connection Specified condition OFF 1(B)-2(E),1(B)-3(CTY) No continuity DOOR 1 (B) - 3(CTY) Continuity ON 1(B)-2(E) Continuity - Inspect map light assy continuity.
- VANITY LAMP ASSY
- Inspect vanity light continuity.
- Check that the continuity exists between terminals 1 and 2, when light is operated.
Standard:
- OFF (closed): No continuity
- ON (opened): Continuity
- Inspect vanity light continuity.
- GLOVE BOX LAMP SWITCH
- Inspect glove box switch continuity.
- Check that the continuity exists between terminals 1 and 2, when switch is operated.
Standard:
- ON (when shaft is pressed): No continuity
- OFF (when shaft is not pressed): Continuity
- Inspect glove box switch continuity.
- GLOVE BOX LAMP ASSY
- Check that the continuity exists between terminal.
Standard: Continuity exists
- RETAINER FRONT DOOR SCUFF PLATE
- Check that the continuity exists between terminal.
Standard: Continuity exists
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.
