Fuel Pump Relay Bmw K75

at least in my K75, the fuel pump is only energized when pressing the start button. I assume that stays energized above certain RPMs or another way of detecting engine running. The starter relay and Fuel Injection relay close, Hall sensors get power.

The FI relay energizes (+) the fuel pump, the idle switch, the injectors and the air flow meter. Fuel Pump Relay - K75S Jump to Latest 7.3K views 5 replies 3 participants last post by FlyingDuck Sep 6, 2007 A. The switch is in the circuit for the fuel pump relay coil, and if the switch is not electrically closed, the fuel pump will not operate.

Those of us with sidecar rigs simply remove the switch and join the wires. The original factory fuel relay is black: The one that BMW currently sells is light green: Later Relays: Late K75/100s as well as K100RS4V, K1 and K1100 bikes use small black 4 pin normally open relays. BMW calls them Mini Relays while Bosch calls them Micro Relays.

BMW part 61311459677. 85. At the age of 20, the pass through on my K75 would open up when hot, shutting off the fuel pump.

The solder connections go bad from heat cycles. To track it down, I added a pair of wires to the fuel pump and ran them out the filler to a volt meter, then rode it around until it quit. You may want to do something like this, but make very good connections to the pump with lugs.

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APPLIES, INJECTION, FUEL. BMW K75. Genuine BMW Part - 61311459677 (61-31-1-459-677).

Ships from BMW of Tri-Valley, Livermore CA. So the fuel pump won't work, and I think I pinned it to the fuel pump relay. So I swapped it with a nearby relay (ABS) and the fuel pump suddenly turned on.

I immediately disconnected it because I had the fuel tank off and it was spitting fuel on the floor. The failure of the BMW fuel pump relay is a common cause of sudden no-start conditions. Recognizing the symptoms, knowing how to test it, understanding where it lives in your specific BMW, and being able to replace it are practical skills that can save time, money, and significant inconvenience.

Replacement relays are readily available, and the procedure is generally straightforward for many.