2009 Mercury Grand Marquis electrical NHTSA complaints: Electrical System

NHTSA — Electrical System Problems


definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
33,148 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2009 Mercury Grand Marquis electrical problems

electrical problem

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2009 Mercury Grand Marquis Owner Comments

problem #3

May 012014

Grand Marquis

  • 35,000 miles


Interior lighting cable burned out. Lost floor lights, door lights and map lights

- Dockinson, TX, USA

problem #2

Jun 142013

Grand Marquis 8-cyl

  • 47,000 miles
I had checked the tire pressures prior to a road trip and found them at 38 psi. I reset the pressures to the spec of 33 psi. Shortly the tire monitor came on and signaled a low tire pressure. I rechecked and they were ok. During my trip the light would keep coming on and I tried to reset the system to no avail. On my return, the power door locks kept malfunctioning. The door key pad would work sometime for both the doors and trunk. The next time they might not. The door switches on both passengers and drivers side would work sometimes. With both the tire pressure system and the door locks acting up and creating a nuisance, I took the car to the Ford dealership, two river Ford in mount juliet, tn.. the found a shorted wire in the harness going to the drivers side module that coordinates most of the safety systems on the car. There was no fire in my case, however, there could have been. I did receive a bill for $272.30. My concern is that Ford apparently does not accept any responsibility for what I consider a safety issue whether it was caused by poor system design on the harness layout or electrical current exceeding the wiring capabilities. Was it caused by excessive movement in the harness or was it current going through the wires as I tried to reset the pressure monitoring system 20-30 times. I am more then interested in knowing how many similar failures Ford has had in the Grand Marquis and the Ford crown vic.

- Mount Juliet, TN, USA

problem #1

Jul 022010

Grand Marquis

  • 17,445 miles
The left turn signals (front, rear & dash) blink faster than the right ones indicating a burnt out bulb even though the left bulbs work. We replaced the front & rear bulbs twice and they worked normal for a short period of time. Then they revert to blinking fast. I replaced the bulbs the first time and the dealership service center replaced the bulbs the second time. There must be something wrong in the electrical system. I've noticed this with other Grand Marquis also.

- St. Louis, MO, USA

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