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1990 Ford Escort Fuel pump electric supply

Tiny
PRONGHORN
  • MEMBER
  • 1990 FORD ESCORT
  • 4 CYL
  • FWD
  • MANUAL
  • 47,000 MILES
My car quit, checked and no fuel to carb.
Checked with test light and no power seems to be
getting to the pump. There are four wires going to
the fuel tank, 2 are grounds, colored black, one is yellow, I believe that is the fuel gauge wire, it blinks with a test light on it and the fuel gauge still works.
The other wire is pink w/black stripe. No power in this wire with the ignition switch on. I checked the fuel pump shut off switch, it is okay. My chilton book on page 5-16 under fuel system/fuel pump diagnosis says "check fuse integrity" what fuse? There is no fuse designated for the fuel pump in any of my books for this car. I located the fuel pump relay under the dash, is this the fuse they speak of? Is there a fuse link somewhere I can check, I am stumped. Can you point me where or what I need to do?
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Friday, April 3rd, 2009 AT 12:29 PM

7 Replies

Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Most likely its a faulty ignition switch
have to check if power getting to relay when 1st key on
if it does check if power getting to ipump shut off switch and out while cranking if so
you have a faulty fuel pump or shorted wire
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Sunday, April 5th, 2009 AT 7:51 AM
Tiny
PRONGHORN
  • MEMBER
  • 11 POSTS
I stated in the original question that the shut off switch is fine, as of now there is no power getting to the fuel pump at anytime, switch in any position, but the fuel gauge is working?
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Monday, April 6th, 2009 AT 1:51 AM
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
When 1st key on you should have power at the shut off switch at least one wire if not
go back to the relay and ignition switch
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Monday, April 6th, 2009 AT 5:37 AM
Tiny
PRONGHORN
  • MEMBER
  • 11 POSTS
I stated in the original question and in my reply and I will repeat it ONE more time, the shut off switch is FINE. That means there is power getting to it and power leaving it, I am not an idiot!
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Monday, April 6th, 2009 AT 12:16 PM
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
WOW !
If power geting to it and out than all ok
check the wire between the swtch and the pump
SIMPLE
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Monday, April 6th, 2009 AT 1:08 PM
Tiny
PRONGHORN
  • MEMBER
  • 11 POSTS
Yeah sounds simple, I know you're trying to help but
the wires don't go from the switch to the pump, they go back under the dash. The switch has a red wire with light green stripe and a white wire. The fuel pump has a pink wire with a black stripe and a black wire.
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Monday, April 6th, 2009 AT 4:50 PM
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Red /LT -grn wire comes from the ignition switch
to relay
do you have a wiring diagram
this is the one i have
send me your email and i will send it by email
if the RED/LT.GRN wire has no power suspect ignition switch


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Monday, April 6th, 2009 AT 8:03 PM

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