!!!!!+a!!a!!!!a84 300D.

Recently just happend today. So yesterday I changed out all my reverse lights/turn signal lights in the rear. When I went out to test them they worked perfect. Today I was going out for a drive to the store I signal left to pull in the store and my dashboard was emitting a fast blinking turn signal light.

When I got home I opened up the rear taillight covers both left and right were not working. I checked the bulbs of the turn signal lights they looked good. The parking lights work but the turn signal lights and brake light in rear dont work

Do the Hazards work?

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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

when I turn the hazards on only front bulbs emit. Nothing emits from the rear

As I recall, the Hazard and Turn signal relay rely on each other. Do you have a spare Hazard switch to try? Also, check the fuses.

__________________
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

II dont have a spare Hazard switch to try out. The thing if it was the hazard switch why would the front turn signals work but not the rear turn signals and brake light? I checked the turn signal relay it works fine. I'm going to dive in deeper tommorow with a test light

The rear signal assemblies on a W123 have a connector to the wiring harness in the trunk. Is it possible the connector is half pulled out?

Hazard switch/turn signal switch not your problem here.

Also there is a connector under the dash which goes to the trunk. Picks up the rear lights and I believe the fuel sender and everything else electrical in the back of the car (which isn't much!). If somehow it got half unplugged it would cause problems with the rear lights. Pretty obvious when you look under the dash, it's the connector with the wire harness leading towards the back.

__________________
The OM 642/722.9 powered family
Still going strong
2014 ML350 Bluetec (wife's DD)
2013 E350 Bluetec (my DD)

both my kids cars went to junkyard in 2023
2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles)
2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles)

1998 E300DT sold to TimFreeh
1987 300TD sold to vstech

I'm also leaning toward either a loose connection or a blown fuse

__________________
2012 Mercedes ML350 Bluetec 102K (hers)
2005 Corvette 55K (fun car)
2002 VW Jetta TDI 238K (mine)
1998 Volvo S70 T5 Turbo 211K (kids)
1994 Ford F150 4WD 246K (firewood hauler)
1983 Mercedes 300D 384K (diesel commuter)

Update: Fixed the turn signal light. Ended up being the light bulbs they had the wrong wattage. As for the brake light no bueno the brake switch under the dash is getting power. I will dive deeper into it when I come from work. Will update thread

Update #2





Ok, false alarm. The brake lights work fine...when the engine's running.
Car off, no brake lights.

I found this out when I jumpered the brake light switch connector and still got nothing, and thought I'd just try starting it to see what happened.

Is this normal for my car? All other cars I'm familiar with have working brake lights with the engine off...ju

Note that tail lights and turn signals work fine with the engine off.

The key has to be in the "Run" position for the brake lights to work.

__________________
Current stable:
1995 E320 157K (Nancy)
1983 500SL 125K (SLoL)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

Gone and wanting to forget:
1985 524TD 167K (TotalDumpster™) [Definitely NOT a Benz]

You have one bulb in that circuit that has a filament burned out. Change the bulbs in front and rear and I'm sure that will fix it. Had the same problem ages ago. Fixed per above.