new power going too fuel pump

npv · 23-02-20, 05:14 PM

right here gos hoping for sum help here please,,my audi 90 1985 has no power going too the pump. ave checked fuse under back seat its good, did a wee check with wire from battrie too rear seat and pump works,,so sum1 told me too take out relay and short two numbers out wich i did and pump worked fuses are good too so any suggestions welcome am a bit stuck now

mikes2 · 23-02-20, 05:38 PM

Have you tested the relay ?

You've already verified the pump is ok. Shorting the 2 pins should be equivalent of the relay working.

So your circuit is good.

You've not got much left. Either the relay is not operating or it's not getting the signal to operate.

npv · 23-02-20, 05:43 PM

hi i bought a new relay but whos not too say its not working

where does signal come from ?

John. · 23-02-20, 05:59 PM

Quote:

Originally Posted by npv

hi i bought a new relay but whos not too say its not working

where does signal come from ?

It'll get a signal from the coil to tell it the engine is spinning, might be worth checking connections at the ignition coil/engine bay?

npv · 23-02-20, 10:30 PM

ok thanks guys will have a look after work tomo thanks

npv · 29-02-20, 09:00 PM

Quote:

Originally Posted by John.

It'll get a signal from the coil to tell it the engine is spinning, might be worth checking connections at the ignition coil/engine bay?

connections on coil were dirty sanded them down nice and shiny now still no power any other ideas as am out off them

John. · 29-02-20, 09:28 PM

Your relay will have 7 pins yes.
Checking the wiring is required, Haynes manual to hand??!!

npv · 06-03-20, 10:35 PM

took relay off today and took it too a local lad who has a 2.0 coupe .we put my relay in and car wouldnt start so my relay is goosed managed too source another one in my loft and cars alive again happy days 1 job off the long list of resto thanks for all who commented

23-02-20, 05:38 PM	#2
mikes2 4 ring whore! Classic Audi Club Member Join Date: Nov 2007 Location: Polmont Posts: 2,617	Have you tested the relay ? You've already verified the pump is ok. Shorting the 2 pins should be equivalent of the relay working. So your circuit is good. You've not got much left. Either the relay is not operating or it's not getting the signal to operate. __________________ 1991 90 quattro 20v sport 1991 90 quattro

23-02-20, 05:43 PM	#3
npv Grown up member Join Date: May 2010 Location: isle of lewis Posts: 649	hi i bought a new relay but whos not too say its not working where does signal come from ?

23-02-20, 10:30 PM	#5
npv Grown up member Join Date: May 2010 Location: isle of lewis Posts: 649	ok thanks guys will have a look after work tomo thanks

29-02-20, 09:28 PM	#7
John. 4 ring whore! Classic Audi Club Member Join Date: Mar 2011 Location: Scottish Borders. Posts: 7,520	Your relay will have 7 pins yes. Checking the wiring is required, Haynes manual to hand??!!

06-03-20, 10:35 PM	#8
npv Grown up member Join Date: May 2010 Location: isle of lewis Posts: 649	took relay off today and took it too a local lad who has a 2.0 coupe .we put my relay in and car wouldnt start so my relay is goosed managed too source another one in my loft and cars alive again happy days 1 job off the long list of resto thanks for all who commented