Where is the Fuel Pump Ground Wire?

1

1988_Mustang_GT

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Jun 21, 2004

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Newfoundland

Sep 30, 2005

#1

• Sep 30, 2005

• #1

Anyone know where the ground wire connection is on a 1988 Mustang 5.0L? My father is driving my old 1988 GT 5.0L and is 4.5 hours away from where I live. He can't get the car started becuase the fuel pump won't cut in. He has already checked the fuel pump reset switch in the back (it's fine - not triggered). He figures the issue is a loose ground wire on the fuel pump. Any ideas?

 

HISSIN50

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Nov 29, 1999

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Sep 30, 2005

#2

• Sep 30, 2005

• #2

If he probed the FP relay and had 12 volt output, then the pump wiring is left. Otherwise it might be a relay control, fusible link, etc issue, and not the wiring at the pump.

I dont know where the ground wire for the pump itself ties in -sorry.

 

jrichker

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Dublin GA

Sep 30, 2005

#3

• Sep 30, 2005

• #3

There are two wires coing out of the top of the fuel pump mount. One is pink & it is power to the pump. The other wire is black & is the ground. They go to a plastic connector that is part of the chassis wiring. The ground is fastened to the chassis by a sheetmetal or machine screw near the spare tire well on the underside of the car.

 

Reactions: Scrapla347

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gtpitstop

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Jan 17, 2006

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Jan 17, 2006

#4

• Jan 17, 2006

• #4

we may also have the same problem but also has check engine light for 542 fuel pump cicuit open pcm to motor and 543 fuel pump circuit open battery to pcm but also the fan kicks the idle to 1900 rpm sometimes