5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

fuel pump wiring help

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Old Sep 21, 2013 | 11:28 AM
  #1  
rydinturbo's Avatar
rydinturbo
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From: boston
Default fuel pump wiring help

ive had a problem with a random miss for a long long time and sometimes my car seems to make alot more power than others. . ive ben getting a code 96, i tested voltage at the pump connector and got 9 volts, so i went to the relay and somehow got 35 volts? i dont know how thats even possible but i started ripping apart my car and found all theese splices. theese dont look factory to me lol does any one have pics of there wiring i dont know what to do with theese
http://i19.photobucket.com/albums/b1...psbc1712c0.jpg
http://s19.photobucket.com/user/jgt8...fd655.jpg.html
http://s19.photobucket.com/user/jgt8...fd655.jpg.html
http://s19.photobucket.com/user/jgt8...27788.jpg.html
http://s19.photobucket.com/user/jgt8...948a7.jpg.html

does anyone know where this wire goes
http://s19.photobucket.com/user/jgt8...c4b92.jpg.html
it was all frayed
http://s19.photobucket.com/user/jgt8...bae5d.jpg.html
Old Sep 21, 2013 | 08:21 PM
  #2  
petrock's Avatar
petrock
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Yeah, those splices don’t look factory and look really bad too. If they are still needed I would replace them and use shrink-tubing to properly seal them up.

35 volts? yeah, unless you’ve got multiple 12 volt batteries (3 to be exact) connected in series in your car I think the 35 volt measurement may have been inaccurate. I’d double check that you had the meters set to volts and not milli-volts or some other scale, or that you missed the decimal point in-between the 3 and the 5 on the screen.

Good luck...
Old Sep 21, 2013 | 11:59 PM
  #3  
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rydinturbo
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kyjuyjii
Old Sep 22, 2013 | 12:00 AM
  #4  
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rydinturbo
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can someone tell me what i should to with the pink wire to the fp relay. it spliced so it runs to the ecm, relay, and pump. should it jus run to the relay and ecm?
Old Sep 22, 2013 | 08:54 AM
  #5  
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ALMOST STOCK
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These are from the 1989 Mustang EVTM

Last edited by ALMOST STOCK; Nov 29, 2013 at 09:38 AM.
Old Sep 26, 2013 | 05:29 PM
  #6  
rydinturbo's Avatar
rydinturbo
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Smile

thanks does anyone know if some of those splices are stock or not? or have a picture of theres
Old Sep 27, 2013 | 04:32 AM
  #7  
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petrock
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No, they are not stock. Stock splices are soldered and have shrink wrap around them. Or they are actual connectors.
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