How to Jump Fuel Pump Relay 2005 Audi A4 Quattro Free Updated
How to Jump Fuel Pump Relay 2005 Audi A4 Quattro Free Updated
06-27-200903:25 AM #1
Forum Moderator Four Rings 
HELP! Fuel pump relay?
Does anyone here have alldata or know which relay is for the fuel pump? It is 4:30 AM and I really really want to first my car "tonight". Thank you AZ! 
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'12 Q7 TDI- Glacier White
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06-27-200908:02 AM #2
Senior Member Two Rings 
Re: Assistance! Fuel pump relay?
this is in a 1.8t which im assuming u have... im guessing its behind the driver's kicking panel
Fuse & Relay Arrangement on the Relay Panels
Micro Central Electrical Panel - behind the storage - commuter'due south side
Micro Central Electric Panel
Relay Location
1 - Dual Horn Relay
2 - Load Reduction Relay
iv - Fuel Pump (FP) Relay
five - Wiper/Washer Intermittent Relay
6 - Wiper/Washer Intermittent Relay
06-28-200909:46 AM #3
Account Terminated Four Rings 
Re: Help! Fuel pump relay?
Relay 372 above the clutch pedal, well if your machine is like mine.
06-28-200910:13 AM #4
Veteran Member Four Rings 
Re: HELP! Fuel pump relay?
on my 98 1.8t, you expect thru the little opening merely above the fuse pannel and its the closest ane you see thru the hole, i call back information technology says 230 on it.
08-20-2009ten:50 PM #five
Senior Member 3 Rings 
Re: Aid! Fuel pump relay?
Relay 372, above the clutch pedal is definitely for the fuel pump in mine too, Mike, but... something seems incorrect.
I have the wires dorsum at the tank tagged and positively identified. the green with yellow stripe is fuel pump positive, the brown adjacent to it is fuel pump ground (the dark-brown beyond from the greenish is ground for the fuel level sender and the smaller violet -due west- blackness stripe is positive for fuel level sender)
OK, Multimeter set to read voltage. central to run= I become 2 volts, engage starter and voltage jumps to 9v (I demand to charge overnight as it's been doing alot of sitting and cranking, but non much running, batt voltage is xi.5v)
when I pull relay # 372 I withal take 2 volts in the run position and while I try to crank it, so it is definitely a fuel pump relay, only I am non understanding why I still have 2 volts/1.9v with #327 removed with key in run or start)?
Likewise, I cannot hear this fuel pump running at all. In that location's a SHITLOAD of dynamat throughout the entire car and it is the quietest car I have e'er been in, but with the admission console open up, windows upward and in a closed (air conditioned) garage, I but tin't hear the damn thing run... what conditions actuate the pump to prime number, and what conditions to run? If the 2v is a prime, could at that place exist some other relay for this? (but why doesn't information technology stop after a few seconds static in the run position (not running)
I thought it would be simplist to simply run my "fuel pump #one" trigger wire to the fuel pump relay, and remove the existing trigger wire from the fuel pump relay
(AEM race box EMS installation, and this is a 97 stroked/built, BT B5 QTM)
at this bespeak I am a bit reluctant to remove the factory trigger wire from relay #372, and replace information technology with the trigger from my AEM, because there seems to be more going on here than a elementary fuel pump relay excursion...
does anyone here understand this circuit, and if and so would you be kind enough to explicate it?
-the big box of Bosch relays/sockets/Tefzel wire are looking like a pretty adept idea right most now, equally I can just rewire it off my standalone to operate as logically equally I care to ready information technology up... -Only I would rather understand how and why information technology operates as information technology does (or if mine has been malfunctioning)
thanks
Kyle
PS any info on the cooling fan relay would be a large help too (which relay is it, where is it located?)
08-21-200912:fifteen AM #6
Veteran Member Three Rings 
Re: HELP! Fuel pump relay?
Originally Posted by JK35 
Relay 372, in a higher place the clutch pedal is definitely for the fuel pump in mine too, Mike, but... something seems wrong.
I have the wires back at the tank tagged and positively identified. the green with yellow stripe is fuel pump positive, the brown next to it is fuel pump basis (the dark-brown across from the green is ground for the fuel level sender and the smaller violet -w- black stripe is positive for fuel level sender)
OK, Multimeter ready to read voltage. key to run= I become ii volts, engage starter and voltage jumps to 9v (I demand to charge overnight every bit it'due south been doing alot of sitting and cranking, only not much running, batt voltage is 11.5v)
when I pull relay # 372 I still take two volts in the run position and while I try to creepo it, so it is definitely a fuel pump relay, simply I am non agreement why I still have 2 volts/one.9v with #327 removed with key in run or start)?
The ECM oftentimes sends low voltages down the "wrong direction" on wires as a diagnostic measure, and is often how the ECM determines specific open/curt faults, relay failures, etc...
The positive wire going to the fuel pump (supplied by the fuel pump relay) also goes to several other solenoids, such as the purge valve as wastegate bypass valve. Looking at the wire diagram yous should be able to verify this by removing fuse S229 (fuse 29 in the fuse console by driver, 20A). This is the fuse separates all those other solenoids from the fuel pump power wire.
But, basically what I'm saying is ignore this pocket-sized voltage.
Your battery voltage of 11.5v seems likely to be the culprit, every bit this is near a fully discharged bombardment. When you creepo the starter it'southward not a surprise your voltage at the fuel pump is only getting 9v, I bet that'southward what you will see at the battery likewise while cranking on such a low charge.
Get your proper voltage at the bombardment before attempting whatever electrical component checks, the car may also starting time.
Last edited by handyvorb; 08-21-2009 at 12:32 AM.
Joel Baldridge
Stage 4 Audi Technician (Master Society Certified)
08-21-200912:21 AM #7
Veteran Member 3 Rings
Re: HELP! Fuel pump relay?
With these quite fuel pumps I've found information technology easy to check to run into if they are running at all past putting a finger on the fuel supply line at the fuel pump flange while turning the cardinal on (assuming you have the seat out and the encompass off of class).
[edit: just saw you were running an aftermarket ECM, is it plug and play or did you have to splice some wires?]
Joel Baldridge
Stage four Audi Technician (Master Guild Certified)
08-21-200912:23 AM #8
Veteran Member 4 Rings 
Re: HELP! Fuel pump relay?
if you need a relay let me know
08-30-200909:xv AM #9
Senior Fellow member Iii Rings
Re: HELP! Fuel pump relay?
Originally Posted by handyvorb
[edit: just saw you were running an aftermarket ECM, is it plug and play or did you have to splice some wires?]
AEM doesn't make a plug and play EMS for our cars, I'm using the 30-1900U and a twin fire CDI ignition, harness is nigh complete (started from scratch with a bare connector body/crimp pins, and built from Tefzel wire, surge tank setup is washed and fits nether a lexan console in the spare tire well (and I tin nonetheless fit a full size spare, PLUS twenty# nitrous cylinder, PLUS sound system (well... not really but I am rebuilding the subwoofer enclosure/amp racks to accomodate that as we speak... here are a few pics
BTW, I decided to totally bypass all the factory shit, equally my factory ECU/relays/fusing are all coming out anyhow... (no 1 really seems to accept a clue about the electrical systems on these cars, and there'southward really no need to add together frustration to an already complicated install/setup. everything I effort to integrate is like pulling teeth... The factory ECU'south practice a great task at running a stock car or are fine for those who desire a "bit" but the AEM Ems I've called is a standalone. it doesn't demand or want the manufacturing plant ECU interfering with anything (it told me this virtually a week ago ;) )
nor am I f-ing effectually with 12 year old relays + wiring. 
08-30-200910:48 AM #10
Forum Moderator Four Rings
Re: HELP! Fuel pump relay?
Wow nice setup!
Originally Posted past aytheory
if you need a relay let me know
I have parted out over 50 B5's at piece of work..
Instagram r_michals
'12 Q7 TDI- Glacier White
B5 A4 track machine -PVW Nov. 2009. SOLD
B7 A4 2.7T swapped with K04s- SOLD
09-01-2009x:08 PM #eleven
Veteran Fellow member Three Rings
Re: Assistance! Fuel pump relay?
Yes JK35, that is indeed a very squeamish setup, makes me want a ane.8t to make fast 
Joel Baldridge
Stage 4 Audi Technician (Master Guild Certified)
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How to Jump Fuel Pump Relay 2005 Audi A4 Quattro Free Updated
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