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Car Forum / Mercedes-Benz Cars / June 2006Brake lights not working 1983 300D
Hi, The brake lights on my car stopped working last week. The bulbs are still good, and all of the fuses are still intact. All other lights work fine, including the tail lights, blinkers... Any ideas? Does anyone know which fuse corresponds to the brake lights on this model and year? Maybe I can try replacing it even though they all look ok? Could it be the brake light switch that's at the pedal? How do I access this and what do I look for? Is there any particular wiring that might be related that I should check? Anyone have this problem with their car?? Thanks for your ideas-- Kate > Hi, > [quoted text clipped - 7 lines] > model and year? Maybe I can try replacing it even though they all look > ok? Fuses are cheap. replace them first and eliminate that possibility. Also, clean the fuse holder connection with the eraser of a pencil before installing the new fuses. > Could it be the brake light switch that's at the pedal? How do I access > this and what do I look for? If you get a manual, it will tell you how to get to the switch. I'm pretty sure even those awful Haynes manuals have that information. They're cheap and at any parts store. If it turns out to be the switch, you're going to need the manual to change out the switch. > Is there any particular wiring that might be related that I should > check? Make sure someone hasn't tried wiring in a trailer light package. My brake lights failed in my TD and in the spare well was a forgotten trailer wiring harness. Since there was no hitch, I never expected to find something like that. > Anyone have this problem with their car?? > > Thanks for your ideas-- > Kate Thanks a lot-- I think it must be a fuse issue, even though the all LOOK ok, it may be the contacts? I will try starting with this like you suggested, but dont want to replace all the fuses-- do you know which fuse corresponds to the brake lights? My fuse box doesnt have a diagram, and the manual from the auto shop doesnt either. Do you happen to know, are these standard layouts? My car is an '83 300D Kate > > Hi, > > [quoted text clipped - 32 lines] > > Thanks for your ideas-- > > Kate Pull the fuse out to check...alot of time it is the fuse that look oksy but corroded and gone when pulle out. Otherwise, it would be your brake switch. Do you know which fuse it is? I don't have a diagram... Kate > Pull the fuse out to check...alot of time it is the fuse that look oksy but > corroded and gone when pulle out. Otherwise, it would be your brake switch. kategrindlay@gmail.com schrieb: > Hi, > [quoted text clipped - 15 lines] > > Anyone have this problem with their car?? The fuse should be nr 12. A list of all fuse numbers and gadgets should be present in the cover of the fuse compartment. Fuse 12 feeds instrument bulbs and safety relais for electric windows . Suspects next to fuse are the brake light switch down behind the brake pedal and the connector nr 8 to the complete rear lamps set. The only other connection from brake light switch goes to the tempomat. Information source is the wiring diagram of the european W 123 280E 1982. But the main electric features are the same for all types of 123.  SignatureRoland Franzius That's really helpful, thanks a lot. I'll check it out. One question though, if the fuse 12 goes to all instrument bulbs and safety relais for electric windows, shouldn't my other instrument lights be out, like the headlights, electric windows, etc? Everything else works fine... It's suspect that BOTH brake lights are out (meaning, its definitely not a loose bulb, etc), and that is all. So could this mean its more likely the brake light switch? Kate > kategrindlay@gmail.com schrieb: > > Hi, [quoted text clipped - 27 lines] > Information source is the wiring diagram of the european W 123 280E > 1982. But the main electric features are the same for all types of 123. FIXED!! Thanks for all the help. Checked fuse 12, and though it LOOKED alright, I think that was indeed the problem. Took it out and rubbed the ends with my fingers, and when i put it back in, the brake lights started working again! >FIXED!! > [quoted text clipped - 3 lines] >the problem. Took it out and rubbed the ends with my fingers, and when >i put it back in, the brake lights started working again! Yup, happens all the time. REPLACE ALL THE FUSES! (to quote Marshall Booth) if they're nearing 10 years old. It's also a good idea to take a bit of finw wet/dry sandpaper and clean all the fuse contacts. SignatureNeed Mercedes parts? http://parts.mbz.org Richard Sexton | Mercedes stuff: http://mbz.org 1970 280SE, 72 280SE | Home pages: http://rs79.vrx.net 633CSi 250SE/C 300SD | http://aquaria.net http://killi.net |
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