For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 1999 🢒 Eldorado 🢒 Body and Accessories 🢒 Body Rear End 🢒 Fuel Filler Door Release Circuit Description

Fuel Filler Door Release Circuit Description for Cadillac Eldorado 1999

Pressing the fuel door release switch provides an input signal to the instrument cluster. The instrument cluster sends a Class 2 serial data message to the body control module (PZM). The PZM internally grounds connector C2 terminal C12, which grounds CKT 93 (WHT) if the following conditions are present:

•	The transaxle is in the PARK position.

•	The valet switch is closed.

Power is supplied through the following components to the now-grounded CKT 93 (WHT):

•	The RADIO/PHONE fuse

•	CKT 40 (ORN)

•	The coil of the fuel door release relay

The relay coil energizes and closes the relay contacts.

Power is supplied from the CONVENIENCE fuse through the following components:

•	CKT 2040 (ORN)

•	The now-closed relay contacts

•	CKT 79 (PNK)

•	The fuel door release solenoid

The solenoid energizes and the fuel door latch assembly releases the fuel door.