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Vintage Cars/FUEL PUMP FUSE LOCATION

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Question
RON, 1R79 280SL R107 I FOUND THE FUEL PUMP RELAY WE DISCUSED BEFORE,ABOVE THE FUSE BOX ON PASS.SIDE PART NO. IS 0015420219. THE RELAY CLICKS WHEN IGNITION TURNED ON,BUT THERE IS NO VOLTAGE AT THE FUEL PUMP. IS THERE A FUSE IN THIS CIRCUIT?ANY OTHER RELAYS? PLEASE HELP.

Answer
did you try and jumper the relay  30 and 87 ( pump should run) .  Is there power to pin 30. Terminal 86 should get 12 volts when cranking and terminal 85 should get a ground when cranking.
If not may be a wire broken somewhere . Yes there is a fuse , should be 8 AMP, not sure which one, number 14 in the 450 models
you should change out all the fuses. They are known to be troublesome even when they may look OK. Get the  type with copper or brass contacts, not the aluminum.
Also could be in the key way ignition switch ( hope not)
I have several of the relays

let me know what you find

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Ron

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I can answer questions on W114/ W115 /W(R)107/W123/W126 Mercedes models 1967-1985. I have rebuilt many of these cars and have problem solved many issues. I have access to much of the technical data and have deailed instructions on fixing the most common issues. Vintage US 1950-1989 and other foreign cars as well If you are going to ask me about car value, please provide ample information on service history, rust issues, and current "needs". Pictures are helpful. Disclaimer on value - I can only give you data on what the market is bringing, and may not be what you want to hear!

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Maintain, restore vintage Mercedes (W114/W115 /W107/W126)

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Ronnies Diesel Shack

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Vintage Forum Member on many List serves

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College Graduate. Self proclaimed and taught Mercedes shade tree mechanic.

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