Where does the fuel pump wire run?
06-18-2008, 08:42 PM
#1
Junior Member
Thread Starter
Join Date: Jun 2008
Location: Plymouth, CT
Posts: 34
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1990 GTA
Engine: 355
Where does the fuel pump wire run?
The gray wire from the relay, the gray wire from the oil pressure relay and the ECM wire merge somewhere.
I need to splice into the wiring after the merge. I looked by my ECM and got lost. I now am thinking its under the door sill or down the tunnel.
Help please, Thanks.
Geo.
I need to splice into the wiring after the merge. I looked by my ECM and got lost. I now am thinking its under the door sill or down the tunnel.
Help please, Thanks.
Geo.
06-18-2008, 09:00 PM
#2
Junior Member
Join Date: Jun 2008
Posts: 62
Likes: 0
Received 0 Likes
on
0 Posts
Car: '91 RS
Engine: 355 on a stand
Transmission: 700R4
Axle/Gears: 3:42
Re: Where does the fuel pump wire run?
As I said in your previous thread, it's inside the wiring harness as it crosses the firewall, between the relay and where it passes thru the firewall on the passenger side. If you access it inside the passenger compartment next to the ECM you will be downstream of the splice.
Last edited by Pop45398; 06-18-2008 at 09:03 PM.
06-19-2008, 04:58 AM
#3
Junior Member
Thread Starter
Join Date: Jun 2008
Location: Plymouth, CT
Posts: 34
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1990 GTA
Engine: 355
Re: Where does the fuel pump wire run?
Thanks for the info.
I thought there would be an easier way to chase it down. I have been searching by the ECM as you stated and it seems daunting. at some point it should be easier to find.
I thought there would be an easier way to chase it down. I have been searching by the ECM as you stated and it seems daunting. at some point it should be easier to find.
06-19-2008, 08:42 PM
#4
Junior Member
Thread Starter
Join Date: Jun 2008
Location: Plymouth, CT
Posts: 34
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1990 GTA
Engine: 355
Re: Where does the fuel pump wire run?
I thought I found it but no go. I stopped checking with the Macgyver(sp) technique! Too many butt connectors!
I believe it splits inside the engine compartment behind the engine and runs down the tunnel.
HELP!
I believe it splits inside the engine compartment behind the engine and runs down the tunnel.
HELP!
06-20-2008, 09:40 AM
#5
Supreme Member
iTrader: (3)
Join Date: Jul 2004
Posts: 2,989
Likes: 0
Received 5 Likes
on
4 Posts
Car: '91 Z28 convertible
Engine: TPI
Transmission: T5
Axle/Gears: 3.27 posi disc
Re: Where does the fuel pump wire run?
That wire is nowhere near the ECM.
It runs from the engine compartment through the C100 bulkhead connector and then down the DRIVER side, by the door under the carpet, then crosses under the rear seat into the middle of the car, up the back and into a plastic through-connector C313 just behind the back seat.
Hope this helps.
Lou
It runs from the engine compartment through the C100 bulkhead connector and then down the DRIVER side, by the door under the carpet, then crosses under the rear seat into the middle of the car, up the back and into a plastic through-connector C313 just behind the back seat.
Hope this helps.
Lou
06-20-2008, 10:43 AM
#6
Supreme Member
iTrader: (7)
Join Date: Mar 2000
Location: Orange, CA
Posts: 5,675
Likes: 0
Received 106 Likes
on
65 Posts
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: Where does the fuel pump wire run?
ExactlyThe wire is grey.
06-20-2008, 12:38 PM
#7
Supreme Member
Re: Where does the fuel pump wire run?
The gray wire from the relay, the gray wire from the oil pressure relay and the ECM wire merge somewhere.
I need to splice into the wiring after the merge. I looked by my ECM and got lost. I now am thinking its under the door sill or down the tunnel.
Help please, Thanks.
Geo.
I need to splice into the wiring after the merge. I looked by my ECM and got lost. I now am thinking its under the door sill or down the tunnel.
Help please, Thanks.
Geo.
Trending Topics
06-20-2008, 01:10 PM
#8
Supreme Member
iTrader: (3)
Join Date: Jul 2004
Posts: 2,989
Likes: 0
Received 5 Likes
on
4 Posts
Car: '91 Z28 convertible
Engine: TPI
Transmission: T5
Axle/Gears: 3.27 posi disc
Re: Where does the fuel pump wire run?
George didn't mean "splice" per se. He wants to interrupt the fuel pump wire and put a switch on it. He has another thread about that.
But you're absolutely right, to "tap into" a wire, it doesn't normally matter where.
Lou
But you're absolutely right, to "tap into" a wire, it doesn't normally matter where.
Lou
Thread
Thread Starter
Forum
Replies
Last Post
theshackle
Tech / General Engine
4
03-05-2017 06:37 PM