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Fuel pump wiring mod. #1623765
09/08/2018 09:52
09/08/2018 09:52
Joined: Apr 2014
Posts: 209
norwich
sharman Offline OP
Making a profit
sharman  Offline OP
Making a profit

Joined: Apr 2014
Posts: 209
norwich
I need some help regarding the fuel pump wiring mod. After changing my mates carpet on his 20vt last week the car now refuses to start. A quick look last night
And we've got no fuel pump. I started checking the usual ( inertia switch, relays and fuses) to find the pump has been directly wired from the battery, past the pump relay and along under the passenger side carpet. I'll be going over tonight with a multimeter to check continuity and voltages but I need to know whether that mod is intended to work in conjunction with the existing relays, fuses and inertia switch or bypass them completely.

Re: Fuel pump wiring mod. [Re: sharman] #1623769
09/08/2018 11:28
09/08/2018 11:28
Joined: Jun 2008
Posts: 276
Kent
Rob_78 Offline
Club member 1081
Rob_78  Offline
Club member 1081
Making a profit

Joined: Jun 2008
Posts: 276
Kent
I can't answer your question as I've not done/seen the modification but here is the link to it......

https://www.fiatcoupeclub.org/forum/ubbthreads.php?ubb=showflat&Number=1103763#Post1103763

Hope it is of some help.


LE 557 - full on resteration in progress
Re: Fuel pump wiring mod. [Re: sharman] #1623836
12/08/2018 06:50
12/08/2018 06:50
Joined: Apr 2014
Posts: 209
norwich
sharman Offline OP
Making a profit
sharman  Offline OP
Making a profit

Joined: Apr 2014
Posts: 209
norwich
Thanks Rob_78. That did help. And thanks barnacle for the write up.
So the fuel pump mod uses the original power supply to switch a new relay that is providing the direct feed from the battery. The problem in this case was the new earth to the fuel pump was routed under the boot carpet and bolted to the 10mm nut holding the seat back. Just didn't notice it when I took the seats out.

Re: Fuel pump wiring mod. [Re: sharman] #1623842
12/08/2018 11:46
12/08/2018 11:46
Joined: Dec 2005
Posts: 32,060
Hemel in the Hempstead
barnacle Offline
Club Member 18 - Minister without Portfolio
barnacle  Offline
Club Member 18 - Minister without Portfolio
Forum Demigod

Joined: Dec 2005
Posts: 32,060
Hemel in the Hempstead
Glad you sorted it!



Don't get no respect! Coupe Fiat 1994-2000 - an owner's guide <-- clicky!

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