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1983 Mercedes 300SD
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Discussion Starter #1
model:1984 300SD Turbo Diesel
problem: glowplug system will NOT operate with key.
question: I want to operate the system with a toggle switch. Which of the million and two wires do I want to connect to? or should I connect it directly to the fuse in the control unit (the flat fuse)?

THANKS EVERYONE!!
 

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1987 420SEL
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1,133 Posts
Have you changed the relay? Why does the system not work with the key? Have you checked all the glow plugs?

You can by-pass the timer relay and connect another relay, operated by a toggle switch, to keep the plugs on for as long as you want. I'd use a momentary switch, so your finger has to be on it, rather than having the possibility of leaving the plugs on and getting the whole system upset.

Do not connect a toggle switch to that fuse.
 
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