1990 Ford Ranger XLT fuel pump problem

ScyraxxX · August 6th, 2006, 11:38 AM

Hi and thanx in advance, Ok here's my problem. About a month ago my truck died on me. I took it home I inspected it and i realized that the fuel pump wasn't working at all, my first guess (REPLACE THE FUEL PUMP) So I did! but still nothing, It's like the fuel pump is not getting any electrical power, i rechecked the connectors and everything but still nothing, i checked all the fuses and their all good! Plz any ideas???

ScyraxxX · August 8th, 2006, 04:30 PM

c'mon ppl plz i need some answers

Drgnracin72 · August 8th, 2006, 04:37 PM

man i wish i knew but i dont!

WeCircleTheProblem · August 8th, 2006, 07:14 PM

does the car randomly die while turned off and sitting in park.....?

Twist 2 Go · August 8th, 2006, 09:08 PM

find the inertia switch on the pass side and look at the electrical connector. It could be melted. If so replace the switch and the wiring connector. Or some of the later year models were bad about the connector becoming unplugged fromthe switch. If that's the case, reconnect and reroute the wiring slightly so it doesn't happen again

ScyraxxX · August 8th, 2006, 10:39 PM

Is this the switch your talking about? I'll try to look for it and see what happens thank you very much for all your help guyz, WeCircleTheProblem: the truck doesn't even turn on it's death engine ain't getting no gas at all! the fuel pump is not working and it's brand new.

Twist 2 Go · August 9th, 2006, 12:12 AM

no, that's not it. It's located on the passemnger side foot well next to the trans tunnel/cowl panel. It will be a small black box with a white push button on top, with a single electrical connector that has 2 wires going into it.

Twist 2 Go · August 9th, 2006, 12:14 AM

Twist 2 Go · August 9th, 2006, 12:14 AM

http://alldatapro.com/alldata/PRO~V3...05110/42240502

ScyraxxX · August 9th, 2006, 04:42 PM

well the all data page i could not see seens i'm not a member, anyways thanks:
I found the inertia switch mine has a red button I replaced it and nothing, i bought the fuel pump relay and nothing! now here's my next question! What about the ignition starter switch? i just want to make sure i've spent a lot of money now

plz help...

OTreborO · August 9th, 2006, 05:35 PM

Have you actually checked the voltage to be sure you are are are not getting voltage at the pump? I am getting 5-6 volts at my pump, and it is not working, but I ran 12V to it directly, not recomended BTW, and it worked. I was told to check the fuel pump relay, so that is what I am going to check next on mine

Twist 2 Go · August 9th, 2006, 05:53 PM

It just showed the location of the switch but you found it. Take a test light or voltmeter and see if you have 12V at the inertia switch connector when the key is turned on or the engine is cranking.

ScyraxxX · August 10th, 2006, 09:52 PM

I checked voltage on the pump connector and no i'm not getting anything checked the inertia switch connector and i'm not getting anything how ever i'm getting 12+ volts on the fuel pump relay connector! going really crazy here any advise?

Twist 2 Go · August 11th, 2006, 01:16 AM

here is a diagram that may help.

ScyraxxX · August 12th, 2006, 04:09 PM

Ok i had to take the gas tank down again and i found out that i was getting 12 v out of the pump connector but when i tried to connect the pump it didn't work at all i tried to connect 12 v directly from the battery to make sure the pump was working and it is but when i connect it on the connector it doesn't i connected the pump and a meter at the same time and i realized that every time i connect the pump the voltage drops from 16 v to 1 volt wtf???? going crazy here! i connected to positive directly from the battery and ground from pump connector and nothing i did the same thing the other way around (ground battery and positive from connector) the only way it works it's directly from battery other wise voltage drops to 1 or 0 volts. Now here's my next question:
Can i connect the pump directly to the ignition?

Twist 2 Go · August 12th, 2006, 04:19 PM

Sounds as if you have either a bad ground or high resistance in the power wire. CK the inertia switch connector and the pins on the switch itself for signs of melting or corrosion. This would cause the voltage drop you describe and was a fairly common problem on these trucks

ScyraxxX · August 12th, 2006, 04:30 PM

yes actually there is corrosion on on one of the inertia leads what should i do? can i connect it directly from the ignition so that when the ignion goes on the pump does aswell?

Twist 2 Go · August 12th, 2006, 06:05 PM

the proper method is to replace the inertia switch and the connector end pigtail. the alternative method that some people do is just to bypass the inertia swich by cutting the wires about 2 inches out of the switch and connecting them together w/ a wiring splice connector.

ScyraxxX · August 18th, 2006, 08:46 PM

Well guyz thank you very much for your help i apritiate your time! I did solve the problem with the fuel pump but it seems to be that the pump is not the problem! damn ranger don't want to start! I'm guessing it's the computer!

Special thanks to:
Twist 2 Go

70fastback · September 2nd, 2006, 02:40 PM

Had the exact thing happen on a 1994 Ranger. It was a bad Bosch relay in the power distribution box under the hood. The problem was intermittent and I chased it for months.

August 6th, 2006, 11:38 AM	#1
ScyraxxX Newbie Join Date: Aug 2006 Posts: 8	1990 Ford Ranger XLT fuel pump problem Hi and thanx in advance, Ok here's my problem. About a month ago my truck died on me. I took it home I inspected it and i realized that the fuel pump wasn't working at all, my first guess (REPLACE THE FUEL PUMP) So I did! but still nothing, It's like the fuel pump is not getting any electrical power, i rechecked the connectors and everything but still nothing, i checked all the fuses and their all good! Plz any ideas???

August 8th, 2006, 04:37 PM	#3
Drgnracin72 Slayer of Douchebags mustangless Join Date: Jan 2006 Location: PURCELL, OKLAHOMA Posts: 9,343	man i wish i knew but i dont! __________________ NUKE THE UNBORN GAY BABY WHALES FOR JESUS

August 8th, 2006, 09:08 PM	#5
Twist 2 Go Hardcore Enthusiast Join Date: Aug 2005 Location: Chesapeake, Virginia Posts: 1,716	find the inertia switch on the pass side and look at the electrical connector. It could be melted. If so replace the switch and the wiring connector. Or some of the later year models were bad about the connector becoming unplugged fromthe switch. If that's the case, reconnect and reroute the wiring slightly so it doesn't happen again __________________ 88 Mustang Coupe 2006 FFW Richmond True Street Runner-Up www.rickscarcare.net http://img146.imageshack.us/img146/2158/ricksadql2.jpg

August 9th, 2006, 12:12 AM	#7
Twist 2 Go Hardcore Enthusiast Join Date: Aug 2005 Location: Chesapeake, Virginia Posts: 1,716	no, that's not it. It's located on the passemnger side foot well next to the trans tunnel/cowl panel. It will be a small black box with a white push button on top, with a single electrical connector that has 2 wires going into it. __________________ 88 Mustang Coupe 2006 FFW Richmond True Street Runner-Up www.rickscarcare.net http://img146.imageshack.us/img146/2158/ricksadql2.jpg

August 9th, 2006, 12:14 AM	#8
Twist 2 Go Hardcore Enthusiast Join Date: Aug 2005 Location: Chesapeake, Virginia Posts: 1,716	__________________ 88 Mustang Coupe 2006 FFW Richmond True Street Runner-Up www.rickscarcare.net http://img146.imageshack.us/img146/2158/ricksadql2.jpg

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August 8th, 2006, 04:30 PM	#2
ScyraxxX Newbie Join Date: Aug 2006 Posts: 8	c'mon ppl plz i need some answers

August 8th, 2006, 07:14 PM	#4
WeCircleTheProblem Regular 1968 302 Coupe Join Date: Jul 2006 Location: Bel Air, MD Posts: 421	does the car randomly die while turned off and sitting in park.....?

August 8th, 2006, 10:39 PM	#6
ScyraxxX Newbie Join Date: Aug 2006 Posts: 8	Is this the switch your talking about? I'll try to look for it and see what happens thank you very much for all your help guyz, WeCircleTheProblem: the truck doesn't even turn on it's death engine ain't getting no gas at all! the fuel pump is not working and it's brand new.

August 9th, 2006, 04:42 PM	#10
ScyraxxX Newbie Join Date: Aug 2006 Posts: 8	well the all data page i could not see seens i'm not a member, anyways thanks: I found the inertia switch mine has a red button I replaced it and nothing, i bought the fuel pump relay and nothing! now here's my next question! What about the ignition starter switch? i just want to make sure i've spent a lot of money now plz help...

August 9th, 2006, 05:35 PM	#11
OTreborO Enthusiast Join Date: Apr 2006 Posts: 639	Have you actually checked the voltage Have you actually checked the voltage to be sure you are are are not getting voltage at the pump? I am getting 5-6 volts at my pump, and it is not working, but I ran 12V to it directly, not recomended BTW, and it worked. I was told to check the fuel pump relay, so that is what I am going to check next on mine __________________ "Those who forget the past are condemned to repeat it" Rev. Jim Jones

August 9th, 2006, 05:53 PM	#12
Twist 2 Go Hardcore Enthusiast Join Date: Aug 2005 Location: Chesapeake, Virginia Posts: 1,716	It just showed the location of the switch but you found it. Take a test light or voltmeter and see if you have 12V at the inertia switch connector when the key is turned on or the engine is cranking. __________________ 88 Mustang Coupe 2006 FFW Richmond True Street Runner-Up www.rickscarcare.net http://img146.imageshack.us/img146/2158/ricksadql2.jpg

August 10th, 2006, 09:52 PM	#13
ScyraxxX Newbie Join Date: Aug 2006 Posts: 8	I checked voltage on the pump connector and no i'm not getting anything checked the inertia switch connector and i'm not getting anything how ever i'm getting 12+ volts on the fuel pump relay connector! going really crazy here any advise?

August 12th, 2006, 04:09 PM	#15
ScyraxxX Newbie Join Date: Aug 2006 Posts: 8	Ok i had to take the gas tank down again and i found out that i was getting 12 v out of the pump connector but when i tried to connect the pump it didn't work at all i tried to connect 12 v directly from the battery to make sure the pump was working and it is but when i connect it on the connector it doesn't i connected the pump and a meter at the same time and i realized that every time i connect the pump the voltage drops from 16 v to 1 volt wtf???? going crazy here! i connected to positive directly from the battery and ground from pump connector and nothing i did the same thing the other way around (ground battery and positive from connector) the only way it works it's directly from battery other wise voltage drops to 1 or 0 volts. Now here's my next question: Can i connect the pump directly to the ignition?

August 12th, 2006, 04:19 PM	#16
Twist 2 Go Hardcore Enthusiast Join Date: Aug 2005 Location: Chesapeake, Virginia Posts: 1,716	Sounds as if you have either a bad ground or high resistance in the power wire. CK the inertia switch connector and the pins on the switch itself for signs of melting or corrosion. This would cause the voltage drop you describe and was a fairly common problem on these trucks __________________ 88 Mustang Coupe 2006 FFW Richmond True Street Runner-Up www.rickscarcare.net http://img146.imageshack.us/img146/2158/ricksadql2.jpg

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August 12th, 2006, 04:30 PM	#17
ScyraxxX Newbie Join Date: Aug 2006 Posts: 8	yes actually there is corrosion on on one of the inertia leads what should i do? can i connect it directly from the ignition so that when the ignion goes on the pump does aswell?

August 12th, 2006, 06:05 PM	#18
Twist 2 Go Hardcore Enthusiast Join Date: Aug 2005 Location: Chesapeake, Virginia Posts: 1,716	the proper method is to replace the inertia switch and the connector end pigtail. the alternative method that some people do is just to bypass the inertia swich by cutting the wires about 2 inches out of the switch and connecting them together w/ a wiring splice connector. __________________ 88 Mustang Coupe 2006 FFW Richmond True Street Runner-Up www.rickscarcare.net http://img146.imageshack.us/img146/2158/ricksadql2.jpg

August 18th, 2006, 08:46 PM	#19
ScyraxxX Newbie Join Date: Aug 2006 Posts: 8	Well guyz thank you very much for your help i apritiate your time! I did solve the problem with the fuel pump but it seems to be that the pump is not the problem! damn ranger don't want to start! I'm guessing it's the computer! Special thanks to: Twist 2 Go

September 2nd, 2006, 02:40 PM	#20
70fastback Look Ma! My First Post! Join Date: Sep 2006 Posts: 1	Had the exact thing happen on a 1994 Ranger. It was a bad Bosch relay in the power distribution box under the hood. The problem was intermittent and I chased it for months.