mercury mountaineer fuse box diagram

2000 MERCURY MOUNTAINEER
186,000 MILES
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MGRAHAM25
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  • 2 POSTS
I have no fuel going to the engine. I have already replaced the fuel pump, fuel filter, and the fuel pump relay switch. i checked the continuity from the wiring harness to the pump and that checks out. I am receiving only 5 volts to the pump. Is this right? what else can I check?

I checked the inertia switch and has not tripped. That is all I have check on that thus far. I have replaced the fuel pump relay and according to the owners manual that there is no actual fuse. The relay is the only fuel related item that I saw in the diagram on both the interior fuse panel and under the hood. The wiring diagram that I have also only relates to the relay and no fuses. What else would cause low voltage going to the fuel pump?

Did a continuity test from the relay to the inertia switch, and that checks out with only.1 ohms. Ran a jumper from the battery to the pink and black wire to the fuel pump and I have pressure. I have 12 volts to the #3 port on the relay. I switched out relay switches, and nothing seems to be working. Could it be in the anti-theft system? Or the computer?
Dec 15, 2012 at 9:53 PM
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MGRAHAM25
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Ok, never-mind. It was the anti-theft system. Up and running just fine now. Thanks for your help though.
Dec 16, 2012 at 5:51 AM
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STRAILER
  • ASE Certified Mechanic
  • 54,837 POSTS
  • ASE Certified Mechanic
Hey MGRAHAM25,

There are three different fuse boxes, two are under the hood and one is on the side of the dash, here is all of the diagrams I found and the legends that tell which fuse does what.

Please let us know what you find so it will help others.

Best, Ken
Dec 15, 2016 at 10:20 AM
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