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-   -   fuel pump relay (http://www.peachparts.com/shopforum/tech-help/37678-fuel-pump-relay.html)

chris560 05-12-2002 05:35 PM

fuel pump relay
 
I got the new fuel pump relay for my 560 sel from fastlane and it cured the problem for a while. I drove it once to the gas station, and I ran it a few other times (waiting for paperwork to clear up registration problems), and the last time I ran it, it died and never started back up-fuel pump out again. I jumped out the fp relay and it started up. Do the new relays have reliability problems as well? What now? Thanks,
Chris

Benzmac 05-12-2002 09:14 PM

No, usually not. It sounds like your fuel pump(s) could be drawing too many amps and blowing the relay like a fuse.

mbdoc 05-13-2002 10:49 AM

Also the ignition module must send a VOLTAGE signal to the TD pin on the fuel pump relay so that the relay knows that the engine is running.

downsmith 05-13-2002 05:43 PM

I have got to go with Benzmac on this one. That was the problem I had with my 500SEL. Take it from me, do not buy cheap crap to replace the fuel system components with. I repeated that montra as I was replacing my third fuel pump.


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