'96 A6 Quattro fuel pump

Kevin Smith kevins9 at cox.net
Sun Dec 16 12:52:35 PST 2007

Thanks for the input Grant. I'm wondering, do you know if the pump is 
only energized for a brief moment when the key is turned on? Basically, 
at the fuel pump fuse in the fuseblock inside the car (driver side dash, 
at the end), will it show 12v for only a couple of seconds, and then 
return to zero, or should that fuse remain energized (12v) for as long 
as the key is on?

The reason I ask is, while testing things, I found that the relay is in 
fact working, but I still wasn't getting power through the fuse. I 
tested the circuit and it was showing a short to ground, until I 
unplugged the fuel pump, then it shows 12v at the fuse, but only for a 
second after turning the key on, then it drops out. I tried to test the 
pump itself for a short circuit, but I can't seem to get a reading, so 
I'm not sure what was causing the short in the circuit before. It could 
be the pump still I guess, but I'm not sure. Does anyone know the pinout 
diagram for the fuel pump connector? There are 4 pins, and I would like 
to know what each pin corresponds to, if possible. I'm not sure if this 
would be in a service manual like Chilton, Haynes, or Bentley, and I 
don't have one currently anyway, so I figured I'd ask.

Any help would be greatly appreciated. Even if someone that has the same 
car could take a couple of seconds to use a voltmeter and test the fuel 
pump fuse to see if it shows 12v only for a moment when the key is 
turned on, or if it stays energized the whole time the key is in the run 


Grant Lenahan wrote:
> On a C4 anyway, you should hear the pump[ energize then stop when you  
> turn the key on.
> If it is not running, it may be dead.
> You can hear it really well if you remove the back seat.
> Grant
> On Dec 13, 2007, at 2:01 PM, Kevin Smith wrote:

More information about the quattro mailing list