Question about Mercury Mountaineer

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I put a new fuel pump in my 99 mercury mountianeer the pump is not kicking on like no power so i switched the relay nd it still didnt work what else could it be?

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  • Expert
  • 156 Answers

Ck power at the inertia switch. In and out.

Posted on Jun 12, 2014

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Posted on Jan 02, 2017

boysor2933
  • 293 Answers

SOURCE: NO POWER TO FUEL PUMP

You may use another brand of relay (say Bosch) then let your electrician make a retrofit to match the connection of the original . Make sure that the current (amps) rating is the same or a little bit higher than the original. If you can't get a unit with higher current rating, use 2 or 3 and connect it in parallel.

Posted on Apr 27, 2009

csmock132
  • 4669 Answers

SOURCE: 1987 GMC sierra , no fuel pump power.

The inline fuel pump fuse on the passenger side firewall is good? Are you jumping it with 12 volts at the test lead or the fuse?

Posted on Jun 26, 2009

  • 1861 Answers

SOURCE: I have a 99 tacoma with no power to fuel

Look to see if you have power at pin 1 of the circuit opening relay. The C.O. Relay is what powers the fuel pump. If you have power there (a blue wire), you have an open circuit between the relay and the pump.

Posted on Jul 17, 2009

  • 11 Answers

SOURCE: 96 mercury cougar xr7 fuel pump

Check your local library for repair manuals...

Posted on Nov 08, 2009

  • 1 Answer

SOURCE: MY 99 MERCURY COUGAR WILL NOT TURN OVER . I

its pats

Posted on Mar 28, 2010

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1 Answer

Location of the fuel cut off switch and how to check it. And replacement


didnt specify vehicle -generic answer if you have a ford Lincoln or mercury look in trunk or passanger side right lower kick panel --any other vehicle check your fuses and relays as well as fuel pump
Yahoo Image Search Results Page How to Check Inertia Switch on Ford Vehicle Fuel Systems How to Check Inertia Switch on Ford Vehicle Fuel Systems

Sep 05, 2016 | Cars & Trucks

1 Answer

99 expedition my fuel pump isnt working checked fuses is there a fusuble fink with key on the fuel shutt off switch behind right kick panel has no power to any of the wires?


Power comes from a fuseable link to the pump relay, then to the inertia switch on the dark green and yellow wire. Power from the inertia switch to the pump is on the pink blue or pink black wire.

Jan 20, 2014 | 1999 Ford Expedition

1 Answer

I have a 06 f150 5.4L the fuel sending unit went out so i had to change to pump and everything, the pickup ran fine before but wen i put the new pump in it will not work so i tried resetting the fuel pump...


Hello, There is a fuel pump Relay in the Powerbox under the hood. The system works this way. When you turn on the Ignition switch, it trips the Fuel pump Relay. The power is routed to the fuse from the Relay and then to the Inertia (safety) cutoff switch. Finally the power reaches the Fuel pump.

You need to test the fuse holder for power before it flows through the fuse. You should have the Ignition on, in order for the Fuel pump Relay to provide power to the fuse. Although the fuse may be good, it can not work without power.

On most Models, the horn Relay is the same part as the Relay on the Fuel pump. Just check your part numbers and swap out the two parts and see if it helps.

Jun 24, 2011 | 2006 Ford F-150

1 Answer

My 2004 mercury mountianeer stopped while driving. Now wont start. It will crank but wont start and makes a different noise when trying to start.


SOUND LIKE FUEL PUMP FAILED. FIRST CHECK REPLACE FUEL PUMP FUSE AND RELAY. THEN CHECK FUEL PRESSURE.SHOULD BE 25 - 65 PSI 4.6 ENGINE VIN CODE H AND 60 -65 PSI FOR ENGINE 4.6 VIN CODE W ENGINE 4.0 VIN CODE E THAT ALL FUEL PRESSURE SPECS. WITH NEW FUEL FILTER.

May 26, 2011 | 2004 Mercury Mountaineer

1 Answer

2000 mercury cougar won't start and they say it may be the fuel pump


There are some other possiblities. The Inertia switch is a bump sensor. When it kicks out your fuel pump has no power. It is located behind the drivers kick panel and you just push and hold the button on it to reset it.

If this does not work there is a fuel pump relay which is suppose to be behind the rear seat in the cargo area(Drivers side) . It is suppose to be behind a plastic cover and it is less likely to cause problems than the Inertia switch.

Nov 14, 2010 | Mercury Cougar Cars & Trucks

1 Answer

1999 Cougar: where is the fuel pump relay located on a 99 mercu...


ok your cut off switch is under the glove box in the passenger footwell in the UK version, and mine did not have any further relay until the wiring hit the fuel pump itself, i had been told it was behind a panel in the back under the rear passenger windows, but having removed the entire inner trim of the rear of the car could find no relay at all. my problem was not relay in the end but a dead fuel pumpconfirmed by checking that i9 was getting voltage delivered to the pins of the pump plug when ket switch in position 2 as that is when the pump primes the engine

May 18, 2010 | 1999 Mercury Cougar

2 Answers

1999 mercury cougar. won't start...cranks...battery ok.


V6 ? 4CYL? Have you verified SPARK? Did anyone check the "fuel pump inertia switch?" Its in the right front kick panel. If it was a "Anti-theft Issue" the light would be on or flashing.

Nov 03, 2009 | 1999 Mercury Cougar

1 Answer

99 olds alero; fuel pump and inst. panel isn't getting power


fuel shutoff switch is actually a fuel pump relay in the relay box under the hood, but it is not unusual for a fuel pump to work on and off before it finally dies. but it is a good idea to check the relay first.

try swapping it with the horn relay (if the horn works). pay attention to the direction the relay is in. on GM's, it's possible to put them in backward or even miss the connectors completely.

you also want to check for proper power and ground in the relay socket.

Oct 03, 2009 | 1999 Oldsmobile Alero

1 Answer

Get spark, but no power to new fuel pump 1999 ford Ranger


the inertia switch is in front of the passenger seat, bolted to the fire wall, hidden by the carpet on an 89 and behind the kick panel on the 99. 99 should have a picture that looks like a gas station pump with a line thru it. pull panel off, push big red button. on 89 its the little grey button on the top.

Oct 03, 2009 | 1989 Ford Ranger

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