Question about 1988 Cadillac Sedan DeVille

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Ignition problem,not enough power a short somewhere also would like to know what is the wiring diagram for the ignition the fuel pump relay wire grounded on the frame and it causes a short somewhere,the fuel pump just does not wind up like it is suppose to causes it to not crank all fuses and relays are good

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1 Answer

I put new fuel pump in & now it tries to start but won't still not enough fuel. Do u have to get air out of system?


To tell you that would need make ,model an year vehicle , so I could look at a wiring diagram . Rather then do that check at the fuel pump relay . Do you know what a relay is ? Watch this video , you can put power right through relay . It could have a fuel pump driver module .

Nov 04, 2015 | Cars & Trucks

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2004 ford explorer when you turn the switch on the fuel pump fuse blows . i un pluged fuel pump it still blows . i went and un pluged fuel control module and it doest blow


Unplugging the fuel control relay or module will ensure no current is entering the wire heading towards the fuel pump. The likelihood is there is a short circuit somewhere along that part of the circuit though it is possible the relay could be faulty.

Ideally, with the aid of a circuit diagram, the wire should be traced from the source at the fuel pump module along its length until the fault is discovered. There is intelligent equipment available that can locate short circuits.

Mar 03, 2015 | Ford Cars & Trucks

1 Answer

Fuel pump circuit short 1988 dodge dakota


That relay powers several other things including the pump.
I think the ignition and injectors are on that circuit too.
I would recommend you get a shop manual with the wiring diagrams and check the other components. A Haynes book may not be detailed enough.

Jul 04, 2012 | Dodge Dakota Cars & Trucks

1 Answer

I have replaced my fuel pump and fuel pump relay and the car(1988 Lincoln Town Car) ran fine for two months. Now it will not start. The fuel pump relay has 4.6 volts when the ignition is on, it is not...


Have to look at a wiring diagram to figure that out

At least I would.

Does the relay energize in your hand,
with batt & grd on coil & ohm meter on
it's contacts, to see if their burnt?

e.g. do you need 12 + volt for it to work

Your looking for a voltage drop ---maybe

Don't rule out the ignition switch it gets a lot of use

Jun 12, 2011 | 1988 Lincoln Town Car

1 Answer

I need to know what terminal from ignition switch goes to fuel pump because the original has a short in it somewhere. Have new switch and relay but still not getting power to pump.Ohm tested pump wires and...


didyou check the inertia switch? if the relay is tuning on, the the problem is between relay and pump. if the wire was shorted you would have burned fuses or smoke somewhere.

Oct 02, 2009 | 1984 Ford F 150

3 Answers

2001 crown vic keeps burning 30A PCM relay fuse


have fuel pump checked i have known a bad fuel pump shorting out causing pcm fuse to blow.

May 10, 2009 | 2001 Ford Crown Victoria

1 Answer

1992 Saturn SC Fuel Pump Problem


You need to get the schematic / wiring diagram . There is a junction block in the center console where the wiring is routed to the entire car. The contact on the power wire to the pump gets burned /dirty and becomes intermittant . It needs to be cleaned .This happened to me twice.

Feb 10, 2009 | 1993 Saturn SC1

1 Answer

My 95 Kia Sportage has a short in the wire running to the fuel pump what should I do?


Do you know how to find a short circuit in electrical circuits ? No !
Finding The Source Of Electrical Shorts In Your Car

Is the circuit blowing the fuel pump fuse ? No not shorted . Where does the whining noise come from ? Do you know how to do automotive electrical testing ?
Basic Electricity for Service Techs Ohm law Current Flow Opens Shorts
Electric Testing Techniques You Need to Know

Do you know what a wiring diagram is , how to read an use one to pin point loactions in a electrical circuit for testing purposes .

Do you know the fuel pump is controlled by the ECU - engine computer . Do you know how to test a fuel pump electrical circuit ?
Testing Electric Fuel Pump Problems with Voltage Drop Test

Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine size . Under system click on engine . under subsystem click fuel controls .then click the search button .Then on the top blue link .Second diagram down is fuel pump electrical circuit .
Do you know how to test a relay ? Relays all work the same ,
VEHICLE RELAYS Operation Diagnosis




May 10, 2017 | 1995 Kia Sportage

1 Answer

No power to fuel pump or to pump fuse at fuse block


You can get wiring diagrams from autozone.com -- they have parts of repair manuals online. I have the smae problem but the person I got my 88 fox gl from wired up a switch going to the fuel pump that you have to leave on while driving. I"m probably giong to fix this soon. It looks like the wire powering the fuel pump relay comes from the ignition switch. So if the pump side of the relay is good, but aren't getting power, you may want to see if your ignition switch isn't providing power on one wire, going to the fuel pump relay.

Jun 24, 2008 | 1990 Volkswagen Fox

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