FUEL PUMP WIRING INFO NEEDED

[barnett468]

I have a 1999 bmw r1100s and I want to run power directly to the fuel ump to see if it works but I need to know exactly how to power it up from the 3 wire connector.

My connector has brown, green/white, and blue/white.

I get the following readings when testing the side of the plug that goes to the bike, not the tank

brown ......................... .16v volts with starter button depressed

blue/white ................... 12v with starter button depressed

green white ................. 12v with key on and also 12v with starter button depressed.


Thanks in advance for any help.

[dirtrider]

11 hours ago, barnett468 said:

I have a 1999 bmw r1100s and I want to run power directly to the fuel ump to see if it works but I need to know exactly how to power it up from the 3 wire connector.

My connector has brown, green/white, and blue/white.

I get the following readings when testing the side of the plug that goes to the bike, not the tank

brown ......................... .16v volts with starter button depressed

blue/white ................... 12v with starter button depressed

green white ................. 12v with key on and also 12v with starter button depressed.
 

Morning barnett468

 

Green/white = fuel pump high  (12v)

 

Brown= fuel pump low (ground)

 

White/blue = low fuel damping 

 

The Green/white should have 12v on it for about 2 seconds at key-ON (fuel system prime) , then drop to 0v, then it should have full time 12v on it again during engine cranking, or with engine running.

 

To run the fuel pump __  (Green/white) to  battery (+) post,, (Brown) to battery (-) post.

 

Do not run the pump for more than a nano second without fuel passing through it as the fuel both lubricates the pump but also cools it.