What is your question?
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What is your question?
On the 2010 Mercury Grand Marquis: Need the location and diagram the all Fuel relays. Does is have a Fuel relay under the vehicle by the frame as I was told be a Pep-Boys Tech? Albert
What makes this problem better or worse?
Nothing, it will start with starting but will not remain running.
How long has your 2010 Mercury Grand Marquis had this problem?
a week
1 Reply
Hi Albert, First, check that the inertia switch in the left side of the trunk (behind padding) is pressed down. If it trips, it will discontinue power to the fuel pump driver module. Also, the fuel pump driver module is located there for testing. The fuse and relay are in the main junction box under the hood, and I would really recommend using the shop manual or alldatadiy.com to view the full circuit as it is not a common fuel pump circuit. You will need a multimeter to track the issue, and the schematic to understand where everything is situated. It is a pretty large system for a fuel pump.