Fuel Pump Relay 'Problem' - Mk1 Golf GTi 1.8
Posted
#1416889
(In Topic #186537)

Settling In

My Golf won't start
That's the easy bit

The relay has been replaced - no joy there. The relay I has sold doesn't have a fuse on top as described in Haynes (but has all five terminals).
I suspect there is a problem with a signal getting to the relay, but don't know enough about vehicle electrics to even begin to know where to start.
When the engine is running the rev counter works (don't know if this is significant, but it may point to a signal from somewhere being Ok).
Help will be greatly appreciated - thanks

Golf GTi Mk1 1800 (daily driver)
Alpine Renault A110 1300S - driven when working!
Suzuki GSXR750W - for the days when the other two aren't mad enough
Alpine Renault A110 1300S - driven when working!
Suzuki GSXR750W - for the days when the other two aren't mad enough
Posted

MOTY 2013

the relay is triggered by the rev counter signal from the coil, the fact your rev counter works suggests this is fine but if someone has bypassed the fusebox this could be the issue.
if the wiring to fusebox is ok then it would seem the signal isnt getting to the relay socket, perhaps it has suffered water damage? the revo pin on the relay is 31b, so look at the corresponding socket on FB for obvious damage
Hello my name is John and I'm a dub addict.
My wiring diagrams and other documents have moved here:
VAG Documents & Downloads
You'll need to sign into google/gmail for the link to work! (its free!)
My wiring diagrams and other documents have moved here:
VAG Documents & Downloads
You'll need to sign into google/gmail for the link to work! (its free!)
Posted

Settling In

Yes it is the later blade type FB.
Golf GTi Mk1 1800 (daily driver)
Alpine Renault A110 1300S - driven when working!
Suzuki GSXR750W - for the days when the other two aren't mad enough
Alpine Renault A110 1300S - driven when working!
Suzuki GSXR750W - for the days when the other two aren't mad enough
Posted

MOTY 2013

if the 18 relay doesnt work then this points to either the ignition live or earth terminal in the fuel relay socket at fault, rather than the rev counter signal

Hello my name is John and I'm a dub addict.
My wiring diagrams and other documents have moved here:
VAG Documents & Downloads
You'll need to sign into google/gmail for the link to work! (its free!)
My wiring diagrams and other documents have moved here:
VAG Documents & Downloads
You'll need to sign into google/gmail for the link to work! (its free!)
Posted

Settling In

TBH - searching the forum I found the 17/18 relay in other posts.
Thanks again

Golf GTi Mk1 1800 (daily driver)
Alpine Renault A110 1300S - driven when working!
Suzuki GSXR750W - for the days when the other two aren't mad enough
Alpine Renault A110 1300S - driven when working!
Suzuki GSXR750W - for the days when the other two aren't mad enough
Posted

Settling In

Next job fit the 16V master-cylinder & servo

Golf GTi Mk1 1800 (daily driver)
Alpine Renault A110 1300S - driven when working!
Suzuki GSXR750W - for the days when the other two aren't mad enough
Alpine Renault A110 1300S - driven when working!
Suzuki GSXR750W - for the days when the other two aren't mad enough
Posted

Settling In

Next job fit the 16V master-cylinder & servo

Golf GTi Mk1 1800 (daily driver)
Alpine Renault A110 1300S - driven when working!
Suzuki GSXR750W - for the days when the other two aren't mad enough
Alpine Renault A110 1300S - driven when working!
Suzuki GSXR750W - for the days when the other two aren't mad enough
Posted

MOTY 2013


Hello my name is John and I'm a dub addict.
My wiring diagrams and other documents have moved here:
VAG Documents & Downloads
You'll need to sign into google/gmail for the link to work! (its free!)
My wiring diagrams and other documents have moved here:
VAG Documents & Downloads
You'll need to sign into google/gmail for the link to work! (its free!)
Posted
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Posted
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Max13082011 said
Hi, I've a mk 1 1.8 8v cab, I've a fuel pump issue, car only running few days ago, now pump won't even prime off of key, I've changed the relay and I can hear it click but no change, any ideas what prob could be or how I can check pump before I buy a new one? Many thanks![]()
Posted

MOTY 2013

if the cab is post-84 it has 2 fuel pumps 1 in the tank and one under the car, if the tank one fails the main pump will eventually die as well
Hello my name is John and I'm a dub addict.
My wiring diagrams and other documents have moved here:
VAG Documents & Downloads
You'll need to sign into google/gmail for the link to work! (its free!)
My wiring diagrams and other documents have moved here:
VAG Documents & Downloads
You'll need to sign into google/gmail for the link to work! (its free!)
Posted

Local Hero


Resurrecting an old post but just found this when trying to sort why my car wouldn't start today and I couldn't hear the fuel pump,prime when switching ignition on. Using the no 17 fuse it fired up straight away, so just ordered a new fuel pump relay. Thanks for your tiprubjonny said
they dont always prime, but to check the fuel pump and wiring swap the 17/18 relay into the fuel pump socket and the fuel pump should always be on with the ignition. if so look at the relay and the rev counter wire as above, if not look at the fuel pump and wiring from it.
if the cab is post-84 it has 2 fuel pumps 1 in the tank and one under the car, if the tank one fails the main pump will eventually die as well

Golf GTI Campaign 1983 Mars Red, Ford S-Max 2015, Audi TT 180 quattro 2003, Fiat 500C 2013, Golf GTE MK7.5

Posted

MOTY 2013


Hello my name is John and I'm a dub addict.
My wiring diagrams and other documents have moved here:
VAG Documents & Downloads
You'll need to sign into google/gmail for the link to work! (its free!)
My wiring diagrams and other documents have moved here:
VAG Documents & Downloads
You'll need to sign into google/gmail for the link to work! (its free!)
Posted

Old Timer

Fuel Pump Relay 'Problem' - Mk1 Golf GTi 1.8
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Posted

MOTY 2013

Hello my name is John and I'm a dub addict.
My wiring diagrams and other documents have moved here:
VAG Documents & Downloads
You'll need to sign into google/gmail for the link to work! (its free!)
My wiring diagrams and other documents have moved here:
VAG Documents & Downloads
You'll need to sign into google/gmail for the link to work! (its free!)
Posted

Old Timer

Fuel Pump Relay 'Problem' - Mk1 Golf GTi 1.8
Sent from my iPhone using Tapatalk
Posted

Settling In

Posted

MOTY 2013

Hello my name is John and I'm a dub addict.
My wiring diagrams and other documents have moved here:
VAG Documents & Downloads
You'll need to sign into google/gmail for the link to work! (its free!)
My wiring diagrams and other documents have moved here:
VAG Documents & Downloads
You'll need to sign into google/gmail for the link to work! (its free!)
Posted

Newbie

Ive got a similar problem with my 1984 gti 8v mk2.
Its hard to start when its cold. I have to use a "startgas" to help it start. Ive unplugged the coldstart valve contact and used a multimeter but it seem dead. It only went to 0.89v when it should go to 9v?
My questions are. Where does the wires goes? Is it a ground issue? Are there any relay to this? Ive read there is a relay 43/53??
I took relay 43 out once beacuse my watertemp went crazy. Does this have anything to do with this?
Posted

MOTY 2013

Hello my name is John and I'm a dub addict.
My wiring diagrams and other documents have moved here:
VAG Documents & Downloads
You'll need to sign into google/gmail for the link to work! (its free!)
My wiring diagrams and other documents have moved here:
VAG Documents & Downloads
You'll need to sign into google/gmail for the link to work! (its free!)
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