Hi folks,

I'm trying to figure out how to get my door operated interior light (map/dome light?) working on my 1995 W124 wagon.

The light works fine by the switch on the sunroof panel and all the door pin switches are in good order but doesn't operate when you open the doors.

The other thing I noticed is that when you open the door, the courtesy lights on the underside of the door panels come on, but the main light doesn't (fronts work, rears don't - not too bothered about the rears honestly).

Any thoughts on what it would likely be? I'd like to have a working interior light when getting in and out of the car if I can

Thanks!

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1975 W115 300D

check the warning module behind the dash all the way on the back , a black box about 1,25 inches by 3 inches long, when it goes out the dome light dosent light off when on automatic or when you open the door

I'll check it out, thanks! How do I access it? I've never heard of it honestly

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1975 W115 300D

take out the instrument cluster, look by the column kinda down towards the firewall, the plug will be pointing at you , the module is held by a 8mm bolt

On my sedan, the rear lights work only when the rear doors are open.

Also check the position of the main courtesy switch.

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D

Check the Owner's Manual for operation of the courtesy lights associated with the various switch positions.

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Fred Hoelzle

I've tried all switch positions and nothing.

It's a bit strange to me that the lights on the underside of the door panels work when opening the doors but the dome light doesn't! I would've thought they'd work on the same circuit (but obviously not!). I'll have to have a look at the module behind the instrument panel this weekend!

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1975 W115 300D

ill try to get you the wiring diagram, it may be behind the passenger airbag in the dash ill look in my 94 e 320 wagon saturday

As to the main lamps for the rear, I'm sure you checked the position of the rear lamp switch on the center console. In position to energize the rear lamps when the doors are opened.

I just discovered that switch today actually It works - but only for the main lights on the left (rear door on the left and the left side one in the trunk). Right side ones don't work, even though the bulbs/switches are fine. Weird

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1975 W115 300D

Found a parts car (E420) that I can grab the module off.

Here's the dash with instrument cluster removed: https://flic.kr/p/2kXXueR

Where am I looking in relation to here? Also, what does the module actually look like? I really don't know

Thanks!

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1975 W115 300D

No thoughts on this?



(Where the warning light module is I mean)

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1975 W115 300D

i believe its the one behind the blue wire in your picture , held by a 8mm nut, when i needed to change one quicker in the shop i just"spread the plastic and slipped the guts out, it may say" hella" n it

I believe you are correct! Pulled it out - 0045450832 "light control relay". I'll get it in my car and see what happens!

Thanks nulu

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1975 W115 300D

pins numbers on module and color black red violet is power supply at pin 6 , pin 2 thru buzzer gets power , ( power to red green), ground is pin 8 black? or brown?,, ( ground signal). pin 1 left seat belt switch green, pin 7 is left door switch br/green/gy/red, pin 5 is right door switch brown/grey ground signal , I believe different years are wired different what is
production date on door of your car?