BenzWorld Junior Member
Date registered: Sep 2006
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Fuel Pump Relay and pin locations? 280SE 1972 4.5L
Can anyone provide tips on how to test the fuel pump relay, and which relay under the hood it even is? I've looked at the fuses, and they all look ok. Somehow, I've suddenly lost the 12v at the fuel pump. nutZ4benZ had a link for steps to troubleshoot a Bosch fuel injection system, but I haven't been able to find out where all the pin locations are at that he refers to when he talks about jumpering across certain pins to test. The relay that I think controls the fuel pump does not have the same numbering scheme on it that he refers to.
I've tried searching though old posts, but haven't found where there is a link to the wiring diagram for this car. I have the German "catalog" of parts for this vehicle, but it only lists the numbers and does not give the part names or how they are wired together.
Thanks again for the helpful input!