Interior Lamps

Voltage is supplied at all times from the CTSY Fuse 3 to the Courtesy Lamps, Dome and Reading Lamps, and IP Compartment Box Lamp. The Courtesy and Dome and Reading Lamps turn on when a ground path is provided by the Headlamp and Panel Dimmer Switch or one of the Door Jamb Switches.

The IP Compartment Box Lamp and Vanity Lamps have switches that provide ground paths when the switches close.

Underhood Reel Lamp
Voltage is supplied at all times to the Underhood Reel Lamp from the HORN Fuse. When the switch is closed, a ground path is provided.

Component Illumination Lamps
When the Headlamp and Panel Dimmer Switch is turned to the PARK or HEAD position, voltage is applied through the PARK LPS Fuse 9 and the closed contacts of the Headlamp and Panel Dimmer Switch to the Component Illumination Lamps. Since all of the Component Illumination Lamps are grounded through Ground G200, the lamps light.

Illuminated Entry
When a door is opened, the Illuminated Entry System is activated. After the last door is closed, the Dome and Reading Lamps will remain illuminated for 20 seconds or until the Ignition Switch is turned on. Voltage is supplied to the module at all times through CTSY Fuse 3. The ground path is provided by CKT 150 to Ground C200. The module senses a ground signal from CKT 157 when a door is opened. The module then provides a ground path to CKT 156 which allows the lamps to light.