2005 GT Fuel delivery problem(s)


custodian

Member
Apr 27, 2018
15
First, I would like to thank everyone that replied to the post I started with the fuel pump(s) issue. That issue has been resolved and it was a "fuel pump drive module" that was bad. I still do not understand why both pump fuses were blowing when only one module was bad.
A new issue has emerged with the correction of the issue.
Before all this began, the fuel gauge had never worked since the acquisition of the car several years ago (the car currently has 691 miles on the odometer}. Now none of the gauges are working, the check engine light is on and the vehicle will not connect to any diagnostic tool (OBD) thus making it not possible to obtain DTC's to know why the check engine light is on.
All fuses have been checked and are good. Other items on the same fuse link as the cluster such as radio, mirrors, door ajar indicator, they seem to be working correctly.
I had great help on the last issue. Now I am asking for more help on this issue.
 

nota4re

GT Owner
Mark IV Lifetime
Le Mans 2010 Supporter
Feb 15, 2006
3,733
Does the GT start? It sounds like a battery/voltage/ground problem?? Do you have a brand new, known-good battery in it? Measure voltage at the post on the alternator. If the car is starting, measure voltage once again when started from alternator. Nominally, you should see ~12.4v when not running and 13.8+ when running.
 

custodian

Member
Apr 27, 2018
15
Yes, the car starts and seems to run ok. Voltage not running at alternator post is 12.6v, running is 14.6v.
 

nota4re

GT Owner
Mark IV Lifetime
Le Mans 2010 Supporter
Feb 15, 2006
3,733
check engine light is on and the vehicle will not connect to any diagnostic tool (OBD) thus making it not possible to obtain DTC's to know why the check engine light is on.
Can you explain more? What devices have you tried? If car is starting and running (ECU is working) then it would seem really, really weird that you cannot connect to the ECU. (Voltages all seem good and alternator is working.)
 

custodian

Member
Apr 27, 2018
15
I have the inner fender off and have located the modules. Is there a way I can bypass the modules and send power directly to the fuel pumps one at a time? Tomorrow I will ping the wiring in both directions to verify I do not have a short. All the wiring I see from the front to the fuel pump itself all look good with no sign of overheating or rodent chewing. Even behind the inner fender well, it is extremely clean.
What is puzzling to me is the fact that both fuel pump fuses are blowing when I try to start the car, not just one. I could understand a single fuse blowing but not both since I cannot locate a position where both pumps wiring come in contact with each other.
This may sound crazy but I am wondering if a poor ground could be causing this issue.
I do appreciate your input.
 

custodian

Member
Apr 27, 2018
15
Does anybody have the wiring diagram for the fuel system? Electrical to the pumps? Went to the local Ford house and they truly were not much help with this problem nor could they help me with any technical information.
 

custodian

Member
Apr 27, 2018
15
Have tried a couple of OBD code readers. The main one we use connected prior to changing the FPDM. It was the one that gave me the codes I posted in the beginning of my thread. I just checked three other cars with this OBD code reader with no problem, then back to the GT, and not able to communicate. I myself do not understand why it is not reading this car, but works on others. And the fact that is has been used on this car several times in the past with no issues has me wondering if I have a ground issue somewhere. Checked all fuses again and all are still good.
 

nota4re

GT Owner
Mark IV Lifetime
Le Mans 2010 Supporter
Feb 15, 2006
3,733
op - I hope the following is readable to you otherwise let me know and I'll upload a pdf.

Epson_06072018132207.jpg
 

custodian

Member
Apr 27, 2018
15
Thank you. I was able to print it off.
What book is it this came from? I asked at the local Ford house if there was any technical literature available to purchase on this car and they were not able to help me with obtaining anything. I would really like to purchase something that shows breakdowns such as electrical schematics, mechanical and body.
 

twobjshelbys

GT Owner
Jul 26, 2010
5,296
Las Vegas, NV
I would really like to purchase something that shows breakdowns such as electrical schematics, mechanical and body.
Start here.

http://www.helminc.com/helm/resource-center/ford-service-manuals-repair-information.htm

I got the mechanical on CD. I think they had electrical too but the whole site is rearranged and I don't have time to drill down.

PS. Mine is an 06 so I got the 06 CD. I've been told the 05 version has errors (maybe minor) and that the 06 is correct even for 05.
 

Howard

GT Owner
Mark IV Lifetime
Apr 26, 2007
1,028
Florida/North Jersey
Many options on eBay. Try to score a 2006 book which contains some corrections from the 2005.
 

custodian

Member
Apr 27, 2018
15
2005 GT
Went to start after sitting idle for about 2 weeks and all it would do is crank, no fire. After checking all fuses, found both fuel pump fuses were blown. Replaced fuses and tried again, both fuses blew approximately 2 seconds apart.
Plugged in analyzer and received the following code: P0190 Fuel Rail Pressure Sensor.
Replaced fuses and Unplugged the fuel rail sensor, cranked engine,no blown fuses this time and of coarse I knew it would not start without this sensor just checking to see if this may had been the problem.
Replaced with new (Ford) sensor, cranked engine, both fuses blew again. Plugged analyzer back in and this time received the following codes:
P0190-Fuel rail pressure sensor (again)
P0191-Fuel range pressure sensor Range/Performance
P0463-Fuel level sensor A circuit high impute
P1233-Fuel pump driver module disabled or offline
Anyone experienced this challenge or have a suggestion.
 

Johntpr

GT Owner
Jan 18, 2017
171
Rockland County, NY
This may help you:

I doubt it is in the rail. Those codes are likely secondary to the pump or pump driver issue.

http://www.fordgtforum.com/forums/showthread.php/23467-Code-P1233
 
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custodian

Member
Apr 27, 2018
15
Thanks for the information.
 

custodian

Member
Apr 27, 2018
15
Ok, been away from vehicle for a couple of weeks due to personal issue. First off, I would like to thank everybody for the advice and suggestions that have come my way. Let me bring everyone up to date on what I have done and noticed.
I had not noticed that the wipers are not functioning correctly, all I have is the high "fast" wipers, no slow or intermittent. The relays for these are in the same box as the fuel pump relays and fuel pump fuses which keep blowing. However, when I checked the wiper fuse in the fuse box in the passenger cabin, it was fine (I knew it would be since the motor does operate on high).
The a/c relay is in the same box, but since the car does not start/run. I cannot check that. Same thing goes for the anti-lock brakes, the relay for these run through the same box.
The fog light relay is in the same box and the fog lights work, no problem there.
Starter relay same box, engine will crank but not run.
Wiring harness looks good at the auxiliary relay box. My next step was to remove the console to get to the fuel pumps and sending unit and check for shorts at this point. What is puzzling me know is the fact that the wipers only work on high and the wiring runs a total different direction from this box to the wiper motor than the fuel pumps.
I have swapped all the relays around using the fog lamps as the base for my test and all relays will operate the fog lamps so I am pretty confident they are okay.
Would anyone please be able to navigate me through the removal of the console? I have an idea how to do this, just want to make sure there are no hidden tricks I need to know.
Thanks in advance.
 

Xcentric

GT Owner
Mark II Lifetime
Jul 9, 2012
5,213
Myakka City, Florida
Wipers run on high when the trunk lid is open.
 

PeteK

GT Owner
Apr 18, 2014
1,255
Kalama, WA
No experience yet, but I'd want to measure the pressure on the fuel rails. I'm thinking it could be the fuel rail pressure regulator stuck and causing the rail pressure to go very high, in turn causing the pumps to work against that pressure and popping the fuses. That could also cause the other errors if the sensors are reading pressure beyond their limits too.
 

GKW05GT

GT Owner
Mark II Lifetime
May 28, 2011
2,541
Fayetteville, Ga.
Check short shifter install threads requires console removal
 

68Rcodeman

GT Owner
Mark II Lifetime
Apr 5, 2008
657
Spring Hill, FL.
Trying to log in and copy and paste directions. Fords sight down. I will try again later.
Here you go.
501-12 Instrument Panel and Console 2005 Ford GT
REMOVAL AND INSTALLATION Procedure revision date: 06/23/2004
Floor Console

Item Part Number Description
1
63045K69
Center console side panels
2
W708149
Screw (6 required)
3
14401
Electrical connectors
4
63045A06
Center console

Removal and Installation

Disconnect the battery. For additional information, refer to Section 414-00.
Remove the engine cover trim panel. For additional information, refer to Section 501-05.
Unscrew the shifter lever knob.
Remove the parking brake bezel and position the parking brake in the set position.

Remove the smart junction box (SJB) cover.
Remove the screws and remove the cover.

Disengage the center console side panels from the center console, then remove the side panels.
Remove the 6 center console screws.
To install, tighten to 10 Nm (89 lb-in).
NOTICE: To avoid damaging the floor console, do not let it contact the instrument panel radio bracket.

Raise the center console at rear to access the electrical connectors at the climate control switches.
Disconnect the electrical connectors.
Remove the center console from the vehicle.
To install, reverse the removal procedure.
 
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nota4re

GT Owner
Mark IV Lifetime
Le Mans 2010 Supporter
Feb 15, 2006
3,733
My $.02. 1) Seems to be more to the story, "Went to start after sitting idle for about 2 weeks" OR 2) Possibility of rodent(s) playing havoc with wiring.

Such an unusual and peculiar problem.