No power to the fuel pumps.


Asked by Jul 23, 2014 at 08:13 AM about the 1991 Mercedes-Benz 420-Class 4 Dr 420SEL Sedan

Question type: Maintenance & Repair

Bought a 1991 420sel.  The fuel pumps don't pump.  Checked with a multi-meter and no power to them.  Any suggestions would be appreciated.

4 Answers


2 options: 1) do it yourself with a wiring diagram and a test light 2) find a good, honest Merc expert- you will need one, eventually-


You can try and replace the fuel pump relays and check your fuses........

2 out of 2 people think this is helpful.

This can be caused by a bad ground wire,if relay,s and fuse,s are good.

2 out of 2 people think this is helpful.

Change the fuel pump relay. I believe it's on the firewall. If you already changed the fuel pumps, the relay should be changed with it.

1 out of 1 people think this is helpful.

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