Fuel Pump/ Relay

Tiny
CJJAMES52
  • MEMBER
  • 1995 FORD AEROSTAR
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
There are three relays in a row under the hood on left fender well. Which one is for the fuel pump?
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Wednesday, December 29th, 2010 AT 6:54 PM

6 Replies

Tiny
DOCFIXIT
  • EXPERT
Hello,

The fuel pump relay is in the middle here is a guide to help you check it and a diagram below to help you see the location.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Wednesday, December 29th, 2010 AT 7:04 PM
Tiny
UMWOLVEFAN
  • MEMBER
  • 1993 FORD AEROSTAR
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 215,000 MILES
Checked for voltage, it's pulling 9v, checked inertia switch it's set correctly, tried different fuel relay and still only pulled 9v any suggestions if more info is needed let me know
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Sunday, October 7th, 2018 AT 8:19 PM (Merged)
Tiny
CARADIODOC
  • EXPERT
Hi umwolvefan. Welcome to the forum. What are the symptoms or what is the problem that sent you to the pump? You're right; 9 volts is too low. Where are you grounding your voltmeter? When things don't make sense after finding low supply voltage, I have to remind myself to look at the ground circuit. Measure the voltage between the pump's ground terminal and a good clean spot on the body. If you find near 0 volts, split the supply side in half by sticking wires in the relay socket terminals so you can measure the voltage on the two contact pins while the pump is drawing current and running. If you have near full battery voltage on both pins, suspect a corroded pin in a connector going to the pump. If you find 9 volts on the relay pins, we have to work backwards toward the battery to find the 3 volt drop.

It sounds like you understand electrical theory so it shouldn't be necessary to run through all of that. Holler back with your findings.

Caradiodoc
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Sunday, October 7th, 2018 AT 8:19 PM (Merged)
Tiny
UMWOLVEFAN
  • MEMBER
The reason I started to look at the pump was because the vehicle was starting and running just fine, then shut it off to go into a bldg came out and it wouldn't start. It was trying to start and it was getting a spark so I sprayed starting fluid and it started to turn over so I disconnected fuel filter and tried to start the vehicle and no fuel came thru. That was when I started to test the lines. I will double check all my connections and grounds and see what the results are thanks
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Sunday, October 7th, 2018 AT 8:19 PM (Merged)
Tiny
CRICE118
  • MEMBER
  • 1994 FORD AEROSTAR
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 225,000 MILES
New fuel pump (tested old one off the van and it works but not on the vehicle) not pumping - changed fuel relay switch, been hard to start as if it wasn't getting any gas - would run fine then during damp part of the time not start or very hard to start - sprayed wire dryer and it helped part of the time, spayed starting fluid and it worked part of the time - now no fire - starter will turn over but engine will not start as if there is no gas but the tank is full (fuel pump not pumping) checked the inertia switch cause it died when hit a bump and has not started since, coil appears to be ok and spark plugs appear ok going to check ECM next - any suggestions?
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Sunday, October 7th, 2018 AT 8:19 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
Have you checked for spark and fuel to the engine? Have you checked the Electronic Engine Control (ECC) relay?

Let me know.

Joe
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Sunday, October 7th, 2018 AT 8:19 PM (Merged)

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