HOW DO I KNOW WHAT'S BURNT OUT, WHEN MY MIRRORS DON'T WORK?

10

Asked by Arthur Feb 27, 2012 at 04:42 PM about the 1993 Mercury Grand Marquis LS Sedan RWD

Question type: Maintenance & Repair

I KNOW IT'S NOT THE FUSES, THAT I CHECKED. WHEN I MOVE THE JOYSTICK FOR THE
LEFT OR RIGHT MIRROR, NOTHING HAPPENS.

3 Answers

9,985

This is going to require getting to the back of the switch for some electrical troubleshooting. Wouldn't hurt to have a wiring diagram for the circuits when doing this as well. For tools you'll need an ohm meter and test light/voltmeter as well. Determine which wire provides power to the switch from the electrical system. With the test light or voltmeter determine if you have power from that wire to the switch connector. If no power, determine why by tracing it back to the source. If you have power- To test the switch contacts, follow the wiring diagram to determine the terminals that are connected with each function of the switch. Use the ohm meter to test continuity between contacts when the switch is in the various adjusment positions. I suspect you'll find the problem, given the symptoms, is either no power at the main feed or the main feed contact in the switch is fried. If that's the case, replace the switch and adjust at will! If all contacts check out, the problem would be in the mirror motors. I doubt this is it unless one failed before the other. Rarely do two components fail at the same time. If yours did, replace them and then go buy lottery tickets! Hope this is helpful!

1 people found this helpful.
10

Thanks a lot Mike. Very helpful indeed. Ended up replacing the switch. Lottery tickets on the other hand...not so lucky. Thanks again man, appreciate it.

1 people found this helpful.

Your Answer:

Grand Marquis

Looking for a Used Grand Marquis in your area?

CarGurus has thousands of nationwide listings and the tools to find you a great deal.

Postal Code:

CarGurus Experts

  • #1
    Tracy Hooks
    Reputation
    9,700
  • #2
    Trippmeister
    Reputation
    5,040
  • #3
    Bob Beaman
    Reputation
    3,780
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Ford Crown Victoria
3 listings starting at $8,960
Used Buick LeSabre
1 listing
Used Ford F-150
315 Great Deals out of 13,805 listings starting at $4,500
Used Chevrolet Impala
5 Great Deals out of 131 listings starting at $3,495
Used Ford Mustang
38 Great Deals out of 1,626 listings starting at $8,995
Used Lexus LS
30 listings starting at $5,995
Used Lincoln Continental
13 listings starting at $21,880
Used Ford Taurus
5 Great Deals out of 80 listings starting at $4,990
Used Toyota Camry
50 Great Deals out of 1,123 listings starting at $784

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. Content will be removed if CarGurus becomes aware that it violates our policies.