![77 Mercedes 300d. Keep blowing glow plug relay fuse. Battery is charged. Plugs read less than 1 ohm removed, and read 12 volts while installed. Any ideas? : r/Diesel 77 Mercedes 300d. Keep blowing glow plug relay fuse. Battery is charged. Plugs read less than 1 ohm removed, and read 12 volts while installed. Any ideas? : r/Diesel](https://preview.redd.it/7qaveabo61211.jpg?auto=webp&s=2fe4851d11f450410afaddb1d7498e9211d82359)
77 Mercedes 300d. Keep blowing glow plug relay fuse. Battery is charged. Plugs read less than 1 ohm removed, and read 12 volts while installed. Any ideas? : r/Diesel
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