Taurus alternator putting out 17.5 volts


Asked by Jan 02, 2016 at 08:48 PM about the 2002 Ford Taurus SEL

Question type: Maintenance & Repair

1 Answer


That is too much, to state the obvious. From: http://www.fordification.com/tech/charging.htm ....- A problem that is not as easy to diagnose is overcharging, which occurs when the voltage regulator fails to limit alternator output. This causes the alternator to overcharge the battery, which in turn can ruin the components that use electricity. Also the sulfuric acid battery fluid vaporizes at a faster rate when too much current is being supplied. If the battery cells are allowed to empty, the dry plates will deteriorate and the battery will die. It is even possible for an overcharged battery to explode. (Should be about 12.5V +/- 0.3) with engine not running and with engine running 13.7V to 14.2V

3 out of 3 people think this is helpful.

Your Answer

Add photo

Related Questions

  • why won't alternate but out charge to battery? 7 answers

    I've got a 97 Ford Taurus that the alternator is only putting out 11.65 volts the battery is good the alternator was tested at Napa noisy but putting out 13 point bolt if you disconnect to Green al...

    1997 Ford Taurus


    Maintenance & Repair

  • 2003 Taurus. 8 alternators in 2 years??? 47 answers

    My 2003 Ford Taurus has gone thru 8 alternators in the past 2 years. I replaced the alternator on Monday and it went out again on Friday. I bought the lifetime guaranteed rebuilt from Pepboys so I've ...

    2003 Ford Taurus SES


    Maintenance & Repair

  • what is causing battery to not hold charge when battery, alternator, and starter are good? 10 answers

    Hi i am having trouble 96 Ford Taurus. The battery died on me , so i checked alternator and it was fried.I changed it and put battery back on. It died again. Three alternators later we were still f...

    1996 Ford Taurus GL


    Maintenance & Repair

  • 01 Ford Taurus Won't Start 1 answer

    My car is having problems starting and check engine light code says there's an evap leak. Has been since mid-summer and just started having difficulty starting when the cold weather hit. Old battery...

    2001 Ford Taurus SE Wagon


    Maintenance & Repair

  • what would stop the alternator from charging on my 1999 ford taurus 3 answers

    battery light came on so i checked alternator, it was bad so i replaced with a new but still wont charge what else could it be?

    1999 Ford Taurus SE


    Maintenance & Repair


Looking for a Used Taurus in your area?

CarGurus has 23,103 nationwide Taurus listings starting at $1,400.


Search Ford Taurus Questions

Ford Taurus Experts

#1 Tom Demyan
Tom Demyan
Reputation 3,240
#2 lightGear
Reputation 1,770
#3 dandyoun
Reputation 1,690
View All

Related Models For Sale

Used Chevrolet Impala"
928 Great Deals out of 35,693 listings starting at $1,500
Used Ford Explorer"
1,363 Great Deals out of 71,762 listings starting at $300
Used Ford F-150"
3,272 Great Deals out of 216,641 listings starting at $1,500
Used Ford Mustang"
736 Great Deals out of 41,064 listings starting at $900
Used Chevrolet Malibu"
1,151 Great Deals out of 73,017 listings starting at $695
Used Honda Accord"
1,262 Great Deals out of 78,683 listings starting at $1,400
Used Toyota Camry"
1,601 Great Deals out of 98,436 listings starting at $895
Used Ford Focus"
1,230 Great Deals out of 56,677 listings starting at $1,495
Used Jeep Grand Cherokee"
1,208 Great Deals out of 73,899 listings starting at $1,593
Used Nissan Maxima"
494 Great Deals out of 24,220 listings starting at $1,500
Used Nissan Altima"
1,351 Great Deals out of 87,430 listings starting at $1,095

Used Cars For Sale

2016 Ford Taurus SEL For Sale
4,583 listings starting at $20,288
2015 Ford Taurus SEL For Sale
8 Great Deals out of 555 listings starting at $13,490
2014 Ford Taurus SEL For Sale
27 Great Deals out of 627 listings starting at $9,995
2013 Ford Taurus SEL For Sale
35 Great Deals out of 702 listings starting at $8,995
2012 Ford Taurus SEL For Sale
6 Great Deals out of 371 listings starting at $6,990