Turn signal flashes fast on one side only

410

Asked by Jan 11, 2014 at 07:29 PM about the Mercury Grand Marquis

Question type: Maintenance & Repair

5 Answers

410

We checked bulbs and even replaced them, but still doing the same thing.

41 of 41 people found this helpful.
20,265

Are both front and rear flashing fast on that side?

23 of 23 people found this helpful.
6,855

Hi, you didn't mention what year the M.G.M was so I can only give you general information. When asking a question always give as much info as possible about the vehicle in question like make, model, year, etc. anything that pertains to the problem. All the bulbs are basically on one main circuit line but pair off to each as is the flasher that controls them. If one bulb is burned out or corroded or just bad, the flasher will still open and close but now faster because of less resistance on that side. . Recheck ALL the bulbs even on the opposite side of the car too. If it's flashing fast on the passenger side, you got a burned out bulb or a bad connection somewhere but not necessarily on that particular side of the car and vise-virsa. Check both sides as that flasher under the dash controls the turn signals on both sides of the car. Does the car have cornering lights? That's a big white light on the front fenders that comes on and stays on while the turn signal is on as you go around the corner thus the name.. If that's burned out there's your problem. It's usually down low but again I don't know where exactly on your Grand Marquis as you didn't give the year of the car and different years are different locations. . Also check those little bulbs in the parking lights. My Crown Victoria (virtually the same as a Grand Marquis) has numerous little bulbs on the front corners of the car and you just might be missing checking them all. Sometimes you didn't even know one was there. They don't all flash but are on the same main circuit. Best to check for a burned out bulb at night in your driveway or inside the garage where it's real dark. You might notice something you overlooked in the daylight. Turn on your 4-way flasher to check all the bulbs at the same time. Wiggle bulbs and check for corrosion with each by pulling bulb and reinstalling then wiggling them to see if there's a change in brightness that you wouldn't see or notice during the day. If all the bulbs light up and are good then it's got to be a bad ground somewhere and unfortunately that could take a long time to find but again, just recheck all your bulbs and their connections. It might take awhile but you will find it eventually. After cleaning and checking all the connections, spray some dielectric compound (comes in a spray can at the autoparts store) into all the sockets and connections. This stuff stops corrosion from starting and stops it from coming back too. .Sorry I couldn't be more help.. Good Luck, Kenny/MrBlueOval

8 of 8 people found this helpful.
70

I don't need many details :-) That is a common problem. I had two 2000 Grand Marquis, and they both had this problem. There is a 'bug' in the electronic light control module. You need to find a replacement box, and this will cure the pain. Worked for me - both times...

7 of 7 people found this helpful.

it is a2007 im looking for the flasher

Your Answer

Grand Marquis

Looking for a Used Grand Marquis in your area?

CarGurus has 1,762 nationwide Grand Marquis listings starting at $1,950.

ZIP:

Mercury Grand Marquis Experts

  • #1
    Tracy Hooks
    Reputation
    5,730
  • #2
    kbro
    Reputation
    2,130
  • #3
    Js08016
    Reputation
    1,870
View All

Related Models For Sale

Used Ford Crown Victoria
5 Great Deals out of 1,195 listings starting at $2,900
Used Lincoln Town Car
31 Great Deals out of 1,753 listings starting at $1,500
Used Chevrolet Impala
514 Great Deals out of 33,923 listings starting at $950
Used Dodge Charger
441 Great Deals out of 27,829 listings starting at $1,979
Used Ford F-150
2,318 Great Deals out of 183,060 listings starting at $1,000
Used Chevrolet Caprice
201 listings starting at $10,595
Used Chrysler 300
327 Great Deals out of 17,844 listings starting at $1,000
Used Ford Mustang
730 Great Deals out of 38,316 listings starting at $895
Used Chevrolet Tahoe
652 Great Deals out of 39,508 listings starting at $1,000
Used Honda Accord
1,111 Great Deals out of 61,915 listings starting at $999
Used Cadillac DTS
56 Great Deals out of 1,574 listings starting at $2,975
Used Ford Taurus
256 Great Deals out of 16,480 listings starting at $1,850
Used Cadillac DeVille
3 Great Deals out of 1,632 listings starting at $1,995
Used Lincoln Continental
18 Great Deals out of 4,307 listings starting at $35,788

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.