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Car Forum / Mercedes-Benz Cars / June 2007Another Electrical snafu 84 300D
My 84 300D has an intermittent problem with the blinkers and hazard lights i.e. they don't work sometimes. When this happens I can rocker the HAZ switch on and off several times and get the blinkers to operate again but the HAZ still wont work. When I do this, I can hear a quiet buzzer near the HAZ switch like a relay clicking on/off or something. Any tips on the circuitry here? I need to get a service book... The flasher unit is under the shifter wood between the shifter and the ashtray. They have a very low failure rate. The hazard switch, because of its location, has a VERY high failure rate. Replace the switch 1st. It should fix your problem. > My 84 300D has an intermittent problem with the blinkers and hazard > lights i.e. they don't work sometimes. When this happens I can rocker [quoted text clipped - 4 lines] > > I need to get a service book... > My 84 300D has an intermittent problem with the blinkers and hazard > lights i.e. they don't work sometimes. When this happens I can rocker > the HAZ switch on and off several times and get the blinkers to > operate again but the HAZ still wont work. When I do this, I can > hear a quiet buzzer near the HAZ switch like a relay clicking on/off > or something. Any tips on the circuitry here? Replace the blinker relais. Its the time after 23 y. Its placed inside the mid console. Remove the ash tray screws, shift backwards horizontally the cover until you can lift it. Dont break the plastic ligaments for the clamps of the cover.  SignatureRoland Franzius OK, so either the HAZ switch or the flasher/blinker relay is malfunctioning. I will look into this. Thank you gentlemen. > > My 84 300D has an intermittent problem with the blinkers and hazard > > lights i.e. they don't work sometimes. When this happens I can rocker [quoted text clipped - 13 lines] > > Roland Franzius I would take the hazard switch apart and clean all the contacts inside. I remember it happened to me one... after I flick the hazard switch a couple of times to knock off the oxidations... all is well for a long long long time. > My 84 300D has an intermittent problem with the blinkers and hazard > lights i.e. they don't work sometimes. When this happens I can rocker [quoted text clipped - 4 lines] > > I need to get a service book... I also have an 84 300D. I've got a Chilton's repair manual I'm not using right now. I bought both the Haynes and the Chilton manuals at the same time, and don't really need the Chilton. If you want I could send it out to you for cheap. Its not as comprehensive on some things, but way more info on other things. Especially wiring diagrams. I could just send you a PDF of the wiring diagrams for this car. Let me know if you want them. Either through here or just email me. |
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