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Typically, console lighting is powered by the same circuit as the dashboard lighting. On most vehicles, this circuit is powered by the instrument panel fuse, which is located in the fuse box. If the fuse is intact, the next step is to check the wiring for any damage or loose connections. The console lighting may have its own fuse, which should be checked as well.
In order to obtain a wiring schematic for your specific vehicle, I would recommend referring to the owner's manual or contacting a Mercedes Benz dealership or repair shop for assistance. They should be able to provide you with the appropriate wiring diagram.
Interior lights and the power door locks are controlled by a electronic control module . Hooking up a factory or some other type professional scan tool an checking for codes an viewing input data to these control modules would be the first thing to do.
The interior lighting system consists of the following:
lighting control module (LCM)
driver door module (DDM)
instrument panel
dome/map combination
courtesy/reading lamps
orientation light
door lamps
footwell lamps
luggage compartment lamp
glove compartment lamp
vanity mirrors
door ajar switches
viewing wiring diagrams an checking power and ground circuits for these modules would be the next step if no codes were found . Principles of Operation
Lighting Control Module
This vehicle uses a lighting control module (LCM). The LCM is a microprocessor-based module that controls several vehicle subsystems, responds to electrical input signals from various switches, sensors, and external modules and is located on the LH side of the instrument panel. LCM subsystem functions include:
headlamps with autolamps
turn signal lamps/hazard flasher lamps
cornering lamps
parking lamps
daytime running lamps
interior lamps
demand lamps
battery saver
The LCM interfaces with the driver door module (DDM) via the standard corporate protocol (SCP) network for the illuminated entry feature.
The interior lamp is illuminated by pressing the individual interior lamp switch. The interior lamp is also illuminated by door ajar switches located in the door latches, when any door is opened. A theater lighting feature gradually increases or decreases the light intensity when switched by opening or closing a door.
The dome/map lamp combination are located on each side of the interior lamp. The map lamps are operated independently of the interior lamp by two switches located on the interior lamps.
The interior lamps are illuminated by holding the panel dim switch in the UP position until the dome lamps turn on. The interior lamp also illuminates when a door is opened and actuates the door ajar warning lamp switch in the door latch.
The front map lamps are powered by the demand lighting circuit and the interior lighting circuit.
The rear passenger reading lamps are incorporated into the rear seat assist handle and are located over the rear door openings. These lamps are illuminated through power supplied by the LCM demand lighting circuit.
Interior lamps (controlled by the LCM) are activated by using the dome lamp switch (instant ON/OFF response) or when a door is ajar. The following lamps illuminate for interior lighting:
instrument panel interior lamps
front map lamps
rear reading lamps
door lamps
Demand lighting includes lamps that are illuminated by the customer by directly actuating a switch. The front dome/map lamps are located in the overhead console. Each lamp is controlled by its own switch.
The following demand lamps are powered by the demand lighting output of the LCM:
glove compartment lamp
vanity mirror lamp
luggage compartment lamp
Each lamp has a dedicated switch that closes to ground to illuminate the lamp.
The front map lamps are powered by either the demand lighting circuit or the interior lighting circuit, depending upon the position of the switch associated with each lamp. When the customer turns the front map lamp switch ON, the front map lamp is illuminated through power supplied by the LCM demand lighting circuit. If the customer moves the map lamp switch to the OFF position, the power from the LCM demand lighting circuit is interrupted and the lamp is reconnected to the interior lighting circuit.
The rear reading lamps are powered by either the interior lighting circuit or the demand lighting circuit.
The luggage compartment lamp is controlled by the trunk ajar switch, and is powered by the demand lighting output from the LCM, and is mounted near the center of the upper rear panel.
The glove compartment lamp system consists of a glove compartment lamp switch and wire and miniature bulb assembly. Opening the glove compartment door closes the switch which provides power to the glove compartment lamp switch and wire. The glove compartment lamp switch is grounded to the body sheet metal.
The vanity mirror lamp system consists of a switch and bulb assembly in the RH inside visor and the LH inside visor. Lifting the vanity mirror cover closes the vanity mirror lamp switch and provides power to the lamps.
The illuminated entry system is controlled by the LCM and provides interior lighting upon entry to the vehicle.
Interior lamps will be illuminated for 25 (±1) seconds which includes a theater lighting ramp-up time (0.5 seconds). This time interval does not include the theater lighting ramp-down time. Interior lamps will be turned off before the 25 (±1)-second timeout if the ignition switch is turned to the RUN or ACC position.
The illuminated entry system has the following additions to accommodate the remote entry system: pressing the unlock button on the remote transmitter will activate the illuminated entry system (with theater ramp-up). When the driver door module detects a button press, it sends a signal on the J1850 communication network activating the interior lamps. The lighting control module will turn off the lamps by sensing the all doors lock signal.
The battery saver feature prevents excessive drain from loads inadvertently left on. When the ignition switch is turned OFF, power is interrupted to the interior lamps and headlamps (after a 10-minute timeout) and the demand lamps (after a 30-minute timeout).
The battery saver has the following inputs:
Looking at wire diagrams for the affected systems an using a DMM - digital muti-meter an testing the electrical circuit's would be the way to find your problem . You pulled the dash to replace the hearter core ? May have left a wiring harness connector un pluged . Free wiring diagrams here http://www.bbbind.com/free_tsb.html
Enter vehicle info. year , make,model an engine size. Under system click on lighting an under subsystem click on interior lighting or click on body & accessories . Pick one of the thing's that's not working correctly an test the electrical circuit , find the problem for one will more then likely fix them all . Watch these video's on electrical testing. Electric Testing Techniques You Need to Know
Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info.year , make , model and engine size. Under system click on lighting ,then under subsystem click interior lighting . click the search button then the blue link
Examining the circuit diagrams, I am pretty certain that the lighting and heater controls are separate circuits, so no common fuse. According to the Jaguar circuit diagram, there is a common ground near the ICE system. Remove the centre console trim, then the ICE and it should be easy to find. Check all earths are secure. Naturally check all fuses first as you never know, but it seems unlikely.
In a factory repair manual.
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