Just put new battery in and two weeks latter its dead again so now two new batteries and car is dead again alter and stater good 2000 Marquis

buster4756
0

Asked by buster4756 Aug 28, 2014 at 01:15 PM about the 2000 Mercury Grand Marquis GS

Question type: Maintenance & Repair

Auto store tested my starter and alternator and sad it was fine now two new batteries and  
dead again maybe there machines wrong and my alternator is bad. Also go home with new
battery again and now my hood is latch is not locking. Any suggestion I'm on a tight budget so I
try to fix as much as I can myself.

4 Answers

FordNut
55,535

Some of the guys at parts houses know what they are doing, and very well educated in auto electrical systems. The some of them are not. Did the test the voltage regulator? An alternator can test 'good' but if the regulator is bad, all bets are off. Have a look here: http://troubleshootmyvehicle.com/ford/4.6L-5.4L/how-to-test-the-alternator-2

1 out of 1 people think this is helpful.
buster4756
0

No they did not check the regulator. Thanks I will test and see. Also the employee would not give me the print out of the test just said its good. I wish people would just be honest, if you don't know or know how speak up. I'm glad I have learn to listen to my car so I haven't ended up on the side of the road in a long time. Thanks again I will keep posting.

FordNut
55,535

He probably didn't know how to interpret the read-out and didn't want to admit it, so won't show you to avoid questions....

Trippmeister
380

Something could be draining the battery, like a trunk light that doesn't go off. Hook up an amp tester and full fuses one by one. Also, and alternator can charge well, but still have bad diodes and drain the battery. Lots of people have similar problems, and they can be hard to find. Disconnect the battery, and measure how many amps or milliamps the car draws with doors closed and everything off. Anything over 1/2 amp, and something is wrong.

Your Answer

Add photo

Related Questions

Grand Marquis
Looking for a Used Grand Marquis in your area?
CarGurus has 2,666 nationwide Grand Marquis listings starting at $1,889.
ZIP:

Search Mercury Grand Marquis Questions

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 3,110
#2 kbro
kbro
Reputation 1,380
#3 Ratpuppy
Ratpuppy
Reputation 840
View All

Related Models For Sale

Used Lincoln Town Car"
72 Great Deals out of 2,280 listings starting at $1,700
Used Ford Crown Victoria"
23 Great Deals out of 1,296 listings starting at $1,109
Used Chevrolet Impala"
1,397 Great Deals out of 49,630 listings starting at $995
Used Cadillac DeVille"
41 Great Deals out of 2,335 listings starting at $1,195
Used Ford Mustang"
764 Great Deals out of 31,566 listings starting at $1,800
Used Toyota Camry"
1,218 Great Deals out of 76,413 listings starting at $800
Used Nissan Maxima"
352 Great Deals out of 18,319 listings starting at $1,499
Used Chevrolet Tahoe"
471 Great Deals out of 28,894 listings starting at $2,500
Used Ford F-150"
2,217 Great Deals out of 123,935 listings starting at $799
Used Ford Taurus"
364 Great Deals out of 19,140 listings starting at $950

Used Cars For Sale

2008 Mercury Grand Marquis GS For Sale
5 Great Deals out of 52 listings starting at $3,000
2007 Mercury Grand Marquis GS For Sale
56 listings starting at $3,900