I have a 2000 Grand Marquis that has the PATS light going off on dash, ABS and cooling fan coming on by them self, and a horn that is going crazy. What could be wrong?

Clay2054
0

Asked by Feb 10, 2013 at 02:59 PM about the 2000 Mercury Grand Marquis LS

Question type: Maintenance & Repair

I have a 2000 Mercury Grand Marquis that has about 135,000 miles on it. 2 weeks ago I had the car
at a relatives and the horn started going off for no reason at all. I took it for a test drive to see if it
would stop and it wouldn’t the horn was going off while driving. I parked it and pulled the horn fuse
and this did not resolve anything. The horn continued to sound off whenever it wanted. I proceeded
to drive the car home. When I did smoke came up from where the steering column cover meets the
dash. The smoke dissipated and I didn't see any more. I then drove the car to and from work (47 miles
round trip) with no foreseeable problems. The next day I fired it up and drove to work and still
nothing wrong. I parked the car and worked a 8 hr shift. Next, I walked out to warm my car up and
the car fired up right away. When I went back after 10 minutes of warming up the car was dead. I had
a buddy jump the vehicle at work and it again fired up but then cut back out after like 45 seconds of
running. After that the security light flashes rapidly and car will not turn over. I now have a cooling fan
that turns on whenever it wants to as long as the battery is connected, a horn that triggers itself, and
I could hear the ABS system trying to kick in by itself. I have since replaced the radiator fan relay, the
EEC relay, and just replaced the ignition switch. None of this has helped. Now I can’t hook up my OBD
code reader. The reader says it can’t link to the PCM through the data link connector. I also noticed
that the check engine light will not illuminate when the car is turned on.  Further I took out the “brain”
and the cooling fan still comes on by itself. I had a family friend check all fuses and relays and
everything checks out ok. To me it sounds like I have a problem with the "brain"/engine control
computer or maybe a short somewhere. What suggestions do you have to fix this problem?

3 Answers

Mark Langolf
885

Check to see if FORD has a recall on your car also if have taken the brain out an its still having same problems after reinstalling the brain it may be time to get a new one from FORD or dread I say it put the car out of its misery.

2 out of 2 people think this is helpful.
natebaxboy
0

what's interchangeable with steering column for a 2000 grand marquis

richksiny
235

call a priest , i think its possessed

Your Answer

Add photo

Related Questions

Grand Marquis

Looking for a Used Grand Marquis in your area?

CarGurus has 2,548 nationwide Grand Marquis listings starting at $1,995.

ZIP:

Search Mercury Grand Marquis Questions

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 4,690
#2 kbro
kbro
Reputation 1,890
#3 FordNut
FordNut
Reputation 1,400
View All

Related Models For Sale

Used Ford Crown Victoria"
7 Great Deals out of 1,571 listings starting at $1,950
Used Lincoln Town Car"
55 Great Deals out of 2,363 listings starting at $1,542
Used Chevrolet Impala"
862 Great Deals out of 33,053 listings starting at $1,300
Used Ford F-150"
2,868 Great Deals out of 202,716 listings starting at $1,500
Used Cadillac DeVille"
4 Great Deals out of 2,336 listings starting at $1,250
Used Ford Mustang"
771 Great Deals out of 39,859 listings starting at $1,450
Used Ford Taurus"
341 Great Deals out of 21,631 listings starting at $1,499
Used Chevrolet Tahoe"
988 Great Deals out of 36,371 listings starting at $2,095
Used Honda Accord"
1,264 Great Deals out of 74,426 listings starting at $995
Used Lincoln Continental"
1,081 listings starting at $43,837
Used Toyota Camry"
1,550 Great Deals out of 94,281 listings starting at $895

Used Cars For Sale

2010 Mercury Grand Marquis LS For Sale
8 Great Deals out of 119 listings starting at $4,500
2009 Mercury Grand Marquis LS For Sale
4 Great Deals out of 108 listings starting at $4,986
2008 Mercury Grand Marquis LS For Sale
7 Great Deals out of 149 listings starting at $2,900