Greetings All,

All reference is made to a '86 300E I can't seem to get the hedliner overhead light to work when actuated by the door switch. Every other position works as it should and both front door contact switches are operating the ground lights, so where is my problem? From reading the manual and posts there is a delay for shut-off of this light in this position, but would it affect the light coming on as well? Any techs out there that have any ideas about circuit board resolding or whatever please reply with help.

Charles

Attached Thumbnails

 

__________________
"Tell me and I will listen, Teach me and I will learn, Show me and I will accomplish, Involve me and I will succeed."
'84 300SD 256,000 Gold on Brown (Mileage Award)
'86 300E 246,000 Blue on Tan

Greetings,

I am still stumped on this problem and any Techs with electrical knowledge PLEASE CHIME IN with possible troubleshooting or repair ideas.

Thanks,

Charles

__________________
"Tell me and I will listen, Teach me and I will learn, Show me and I will accomplish, Involve me and I will succeed."
'84 300SD 256,000 Gold on Brown (Mileage Award)
'86 300E 246,000 Blue on Tan

The problem is in the lamp fixture itself. There is some electronic circuits that fail. Replace the whole assembly. Had same problem on a 87 420sel.

__________________
I got too many cars!! Insurance eats me alive. Dave

78 Corvette Stingray - 3k
82 242 Turbo Volvo - Manual - 270k
86 300e 5 speed manual - 210k
87 420sel - 240k
89 560sl - 78k
91 420sel - 205k
91 560sel - 85k
94 GMC Suburban - 90k
97 Harley Davidson Heritage Softail - 25k
00 GMC Silverado 1 ton 30k

Greetings,

Thanks for the reply, but I guess what I am looking for is what item on the circuit board has gone bad, and is that component replaceable by itself? Like many circuit board items on these Benz's the individual $.59 part can be replaced instead of spending $76.00 on the whole unit.


Thanks,

Charles

__________________
"Tell me and I will listen, Teach me and I will learn, Show me and I will accomplish, Involve me and I will succeed."
'84 300SD 256,000 Gold on Brown (Mileage Award)
'86 300E 246,000 Blue on Tan

Have you measured a current between the door switch and the light bulb, and between the door switch and the wire feeding the lamp assembly? If you have power to the assembly that switches on and off with the door switch being activated, but not to the bulb, I suspect that the dimming circuit (often a capacitor) has failed. If you have no power to the assembly or the bulb, I would guess it is a wiring problem between the switch and the assembly. Also, check the fuses. I don't know if there is a fuse between the door switch and the overhead lamp, but it may be something that simple, and the simple things are worth checking first. Good luck!

__________________
John

2003 Firemist Red/grey leather SL 500
2015 Palladium Silver/black mbtex GLK 350
1987 Smoke Silver/burgundy mbtex 300E Sportline (SOLD)

Click to see 87 300E

Greetings John,

Like I mentioned, every other position of the switch causes the lights to do what they are suppose to and there is current up to the plug. Any ideas how to dismantle the case that holds the circuit board, or which component is defective?


Thanks,

Charles

__________________
"Tell me and I will listen, Teach me and I will learn, Show me and I will accomplish, Involve me and I will succeed."
'84 300SD 256,000 Gold on Brown (Mileage Award)
'86 300E 246,000 Blue on Tan

Hi:

I think we posted at about the same time, I hadn't seen your posting on the circuit board when i wrote my response (7:42 vs 7:47!) . On some cars it is as simple as a resistor/capacitor assembly, making it an easy fix. I am not familiar with the w210 - they may have added a timer IC or some such to make sure it delayed to the microsecond . When my wife gets home i can look in our 98 C230 and see what looks promising!

__________________
John

2003 Firemist Red/grey leather SL 500
2015 Palladium Silver/black mbtex GLK 350
1987 Smoke Silver/burgundy mbtex 300E Sportline (SOLD)

Click to see 87 300E