The battery saver relay is controlled by the Generic Electronic Module (GEM
) and is located in the fuse junction panel.
The battery saver relay is designed to supply B+ voltage to:
Dome and map lamp switches. Have not checked
Visor lamps. Don't Have
Glove compartment lamp switch. Light doesn't stay on + part of C235 (see below)
Cargo lamp switch. Checked
Interior lamp switch on headlamp switch. Unplugged C235 from Fuse
Block which contains "headlamp switch", still drained amps
Interior courtesy lamp relay. Checked
Delayed accessory relay. Checked
The battery saver relay prevents excessive battery drain by interior lighting circuits.
The battery saver relay operates as follows:
supplies a ground signal to the battery saver relay anytime one of the wake up inputs of the GEM
A wake-up command is sent when:
Any door becomes ajar or is opened or closed. Unofficially confirmed not the problem???
The ignition key is inserted or removed in the ignition switch. checked
The ignition switch is turned from OFF to RUN. checked
The ignition switch is turned from OFF to ACC
"ignition switch" is a part of the C235 which I tested when disconnected (see attachment)
A wake-up request is received from the remote anti-theft personality module. Checked, PATS Module is part of C235
The driver or passenger door lock cylinder is turned to unlock. Passenger side checked
will maintain the ground input with ignition in RUN or for 40 minutes from the last input activation with ignition switch in the OFF position. After 40 minutes the ground signal is discontinued.