2000 Grand Marquis strange electrical problem

Asked by Jul 11, 2016 at 05:59 PM about the 2000 Mercury Grand Marquis LS

Question type: Maintenance & Repair

Will be driving normally....then what sounds like a "relay" behind the steering wheel clicks.... then the blinkers blink at strange intervals, alternator hum starts in radio, engine begins to knock, and a couple of warning lights come on for just a second...then go off.  Anyone have any suggestions?

2 Answers

Short on the wiring harness somewhere. Could need a new computer

1,205

Tman is right. You could get a computer at a junk yard. Check wiring harnesses. The CPU is in the dash L side upper. You could losein the one center bolt, work that huge wiring harness off, spray with contact cleaner, the re-install.

Your Answer

Add photo

Related Questions

  • Mercury Grand Marquis electrical problem 3 answers

    My 2008 Grand Marquis has a strange problem. The tire pressure sensor is indicating a fault with the system at the same time the door lights when open do not work, the key fob to open the doors ...

    2008 Mercury Grand Marquis LS

    -

    Maintenance & Repair

  • 2000 Grand Marquis key broken in trunk lock 1 answer

    Only key I have for 2000 Grand Marquis has broken off in trunk lock. Nothing in owners manual that indicates how to get a replacement. Anyone have any suggestions?

    2000 Mercury Grand Marquis LS

    -

    Maintenance & Repair

  • electric seats will not move forward or backward on 2000 mercury grand marque 2 answers

    the drivers seat and the passenger seat do not move forward or backward on the 2000 mercury grand marque but the seat reclining works. What do you think is the problem?

    2000 Mercury Grand Marquis GS

    -

    Maintenance & Repair

  • My 2000 Mercury Grand Marquis always blow hot air out. What is the problem 1 answer

    My 2000 Mercury Grand Marquis had a clicking sound with the switch on of heater blowing, AC or vent.... at beginning time and then it quit but now I only get really hot air blowing out. Even when I...

    2000 Mercury Grand Marquis LS

    -

    Maintenance & Repair

  • Grand Marquis SE 11 answers

    Has anyone seen one of these? I have only seen them advertised, but none have been locally for me to look at. Supposedly a limited edition, 2 door with console. Rare but sounds pretty neat if I cou...

    Mercury Grand Marquis

    -

    General

Search Mercury Grand Marquis Questions

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 5,290
#2 kbro
kbro
Reputation 2,050
#3 Js08016
Js08016
Reputation 1,660
View All

Related Models For Sale

Used Ford Crown Victoria
12 Great Deals out of 948 listings starting at $2,990
Used Lincoln Town Car
26 Great Deals out of 1,805 listings starting at $1,695
Used Chevrolet Impala
542 Great Deals out of 28,509 listings starting at $700
Used Ford Taurus
197 Great Deals out of 19,234 listings starting at $500
Used Ford F-150
2,395 Great Deals out of 210,249 listings starting at $895
Used Ford Mustang
331 Great Deals out of 45,576 listings starting at $2,000
Used Honda Accord
681 Great Deals out of 82,246 listings starting at $500
Used Cadillac DeVille
5 Great Deals out of 1,580 listings starting at $2,900
Used Chevrolet Tahoe
609 Great Deals out of 27,547 listings starting at $600
Used Chevrolet Silverado 1500
1,985 Great Deals out of 160,214 listings starting at $1,995

Used Cars For Sale

2010 Mercury Grand Marquis LS For Sale
7 Great Deals out of 95 listings starting at $3,999
2009 Mercury Grand Marquis LS For Sale
82 listings starting at $4,300
2008 Mercury Grand Marquis LS For Sale
5 Great Deals out of 94 listings starting at $500