Circuit Operation
FUEL TANK FILLER DOOR RELEASEB+ is applied to the fuel door release relay at all times. When the transmission control selector switch is in the PARK position, depressing the fuel tank filler door lock release switch will cause the fuel door release relay to energize. Ground is provided by the transmission control selector switch being in the PARK position. With the fuel door release relay energized, B+ will be applied to the fuel tank filler door lock actuator. When the fuel tank filler door lock actuator is grounded through the normally open contacts of the door lock relay K135, the actuator will energize and unlock the fuel door.