wiring dilema - Mercedes-Benz Forum

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post #1 of 6 (permalink) Old 04-28-2011, 05:26 PM Thread Starter
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wiring dilema

Hello, I am hoping someone can provide me some insight into an electrical problem on my 1976 300D. The brake, hazards,turn signals and possibly other lights won't work. From the diagrams in my manuals it appears that all these are functions of the ignition being in the run pos. (except the hazards). does anyone have a wiring diagram showing where the fuse block is fed from and which fuses feed what. Thanks
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post #2 of 6 (permalink) Old 04-30-2011, 10:21 AM
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The fuse box is fed from the battery. Inside the lid of the fuse box there is a piece of paper saying which fuse is responsible for what circuit.

The fuse box is in the engine bay on the firewall.
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post #3 of 6 (permalink) Old 04-30-2011, 03:54 PM Thread Starter
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Thanks for the reply, however, apparently my paper is missing from the fuse box which says what feeds what, and, more importantly, whatever feeds the fuse panel is not doing so. Does in come from the ignition or a relay switch or what? THIS is my dilemma. I both hanes and chiltons manuals, neither one of them show a diagram of the system.
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post #4 of 6 (permalink) Old 05-02-2011, 09:58 AM
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Hey I have a factory diagram from the cd. Is this what you need? It is to large a pdf to post here. pm me with your email and I will send it to you.

Last edited by 240d Tanner; 05-02-2011 at 10:00 AM.
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post #5 of 6 (permalink) Old 12-01-2011, 01:04 PM
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I have a question for you if you do not mind. I have a 1976 300D and the power windows stoped working. I can not locate the fuse for the power windows. Do you know where it is?.

Thanks for your help.

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post #6 of 6 (permalink) Old 12-02-2011, 02:17 PM
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One common problem with electrical gremlins is that the aluminum fuses have a dissimilar-metal corrosion problem with the brass fuse holder. A temporary fix is to 'spin' the fuses in their holders, breaking loose the corrosion.

Before you do this job, go to the auto parts store and get a packet or two of clectrical contact grease. These should be very inexpensive.

The cure for this is to remove each fuse, one at a time, and buff the ends with a heavy cloth (canvas or denim). Before you put each fuse back in, put a tiny dab of the contact grease on each end. This prevents air and moisture from getting to the contact points, eliminating future corrosion.

There are fuse kits available with brass tipped fuses, rather than aluminum, but some people have reported difficulty finding them.

Good luck.

Remember: It's not just a car. It's an Adventure.
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