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 MANUALSCADILLAC1997SEVILLE SLS V8-4.6L VIN YREPAIR AND DIAGNOSISBODY AND FRAMEBODY CONTROL SYSTEMSBODY CONTROL MODULEDESCRIPTION AND OPERATIONBODY CONTROL SYSTEM CIRCUIT DESCRIPTIONLIGHTING CONTROLINTERIOR LIGHTING CONTROL
1997 Cadillac Seville SLS V8-4.6L VIN Y
Interior Lighting Control
1997 Cadillac Seville SLS V8-4.6L VIN YSECTION Interior Lighting Control
The PZM provides the following interior lamp control:
^ Courtesy lamps.
^ Illuminated Entry Control of Courtesy Lamps.
Courtesy Lamps are enabled by the following inputs:
^ By discrete input to the PZM from the door jamb switches.
^ RFA transmitter activation (function of illuminated entry).
^ The left front or right front door has been unlocked using a key (function of Illuminated Entry).
^ Air Bag deployment.
The PZM only enables Illuminated Entry control of the courtesy lamps when the IPC twilight photocell indicates darkness via the serial data line to the PZM.
^ Courtesy lamps.
^ Illuminated Entry Control of Courtesy Lamps.
Courtesy Lamps are enabled by the following inputs:
^ By discrete input to the PZM from the door jamb switches.
^ RFA transmitter activation (function of illuminated entry).
^ The left front or right front door has been unlocked using a key (function of Illuminated Entry).
^ Air Bag deployment.
The PZM only enables Illuminated Entry control of the courtesy lamps when the IPC twilight photocell indicates darkness via the serial data line to the PZM.
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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.