2008 GT500 wiring diagram

[me32]

Does anyone happen to have a complete wiring diagram of 2008 GT500 Fuel system from the fuse boxes to the rear FPDM's.

Thanks

 

[SCGallo2]

I looked in the paper Workshop Manuals... no joy.

 

[me32]

I looked in the paper Workshop Manuals... no joy.

Thanks for the look. Im having a short in the line for the 2nd fpdm. Reading 1 volt at the back. But at the 2nd small fuse box im getting 13.5 volts. Just to test it did a jumper from the fuse box to the 2nd fpdm in the back and sure enough gave power and the 2nd pump kicked on.

On the 2008 its red wire for the 2nd fpdm and a white wire for 1st fpdm.

 

[cossiedriver]

This should be it...

Joerg

 

[me32]

This should be it...

Joerg

Thank you joerg

 

[cossiedriver]

You´re welcome ;-)

 

[me32]

You´re welcome ;-)

Good news . Had a couple issue. 1st was a bad/burned relay for the secondary FPDM. Replaced that and the 2nd fpdm was back online with both fuel pumps working.
2nd issue was partly my fault bad wiring for the kb boost a pump. Wires were getting way too hot due to high resistance and keeping them in the same loom was a bad idea. Rewired and reloomed all the wires individually. Temp went down alot from about 115-118f to 102-105f on the wires and bap.

 

[Poorbrokeboy]

Good news . Had a couple issue. 1st was a bad/burned relay for the secondary FPDM. Replaced that and the 2nd fpdm was back online with both fuel pumps working.
2nd issue was partly my fault bad wiring for the kb boost a pump. Wires were getting way too hot due to high resistance and keeping them in the same loom was a bad idea. Rewired and reloomed all the wires individually. Temp went down alot from about 115-118f to 102-105f on the wires and bap.

 

[Poorbrokeboy]

I have a similar issue on my 28k GT500. The dealer has replaced the pump twice, the pressure sensor, and both fpdms without fixing the issue. Trying to fix it myself now. Can anyone tell me where that relay is located? Any help appreciated.

 

[me32]

I have a similar issue on my 28k GT500. The dealer has replaced the pump twice, the pressure sensor, and both fpdms without fixing the issue. Trying to fix it myself now. Can anyone tell me where that relay is located? Any help appreciated.

Its located under the hood on the passenger side on strut tower. There is a very small fuse box and next to that is the small relay box , depending on your option there is three of 4 relays inside there. I recommend only using OEM ford relays.

 

[Poorbrokeboy]

My book shows those to be HID relays. It probably wrong. Thanks for the information.

 

[me32]

My book shows those to be HID relays. It probably wrong. Thanks for the information.

There are HID relays in there if you that option. One of those relays is for the 2nd FPDM/fuel pump.