My front dome light doesn't come on when the door is opened. If I move the switch manually, the light comes on so the bulb is good. Rear works fine with opening and closing of the door. Any ideas appreciated.

Thanks,
Harry

What year & model car??

Does it work from the passenger side?

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

Sorry about that. Its an 84 300D. Neither door will turn the light on. The light comes on if i manually turn the switch to the front or rear. Center position, the light is off.

Thanks,
Harry

Can anyone help with my dome light problem. Front doesnt come on when either door is opened, but it works when operarting manually with the switch.
84 300DT.
Thanks,
Harry

Each door switch sends a ground to the dome lamp & also to the lights in the bottom of each door.

Do the lights in the doors come on?

Testing would be done at dome lamp with volt meter.

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

I dont have any lights in my doors, front or rear. The rear light comes on when the rear door is opened. Could both front door switches be bad or could one bad one cause this problem? Thanks for your replies.

Harry

The lamp is working when operating the dome switch manually. I pulled the door switches. No voltage. Whats next??

Thanks,
Harry

I made an error in my last post. I DO have voltage. It pegs the meter when set on 10v. On 50v setting I am guessing maybe 12V. I also have continuity on the switch itself disconnected on all positions; that is pushed slowly in and let slowly out continuity is present with no fluctuations. I would have thought pushed all the way in ,I would have no continuity. All replies appreciated.

Thanks,
Harry

Sorry guys. WRONG again. I discovered i had a bad meter. I have continuity on the switch with the button out. When I push it in..no continuity. I'm thinking dome light switch.

Thanks,
Harry