What's draining battery?

Asked by GuruJKPQZ Aug 04, 2020 at 10:21 PM about the 2003 Ford F-150 Lariat Crew Cab 4WD SB

Question type: Maintenance & Repair

New battery,alternator charging to 14 volts. My battery is
getting drained when it's not running.

1 Answer

135,155

Anytime a battery loses power in a short time, check the alternator to see if it's supplying enough juice to keep the battery charged. Next, look for a Parasitic Draw. This is a fault in the electrical system where something that should be off remains on; it acts like a switch left closed. With the car off, check the car's electrical system using a multi-meter one fuse at a time until you find one that has current flowing through it. Then follow that system from the fuse through the car until you find the fault; it might be a defective device or crossed/shorted wires. Meantime, use a battery tender to keep the battery charged. It's a small trickle charger that connects to the battery terminals and plugs into wall current.

Your Answer:

Ford F-150 Experts

  • #1
    OJ
    Reputation
    30,920
  • #2
    G A Arne
    Reputation
    12,140
  • #3
    F_O_R
    Reputation
    11,790
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Silverado 1500
90 Great Deals out of 4,742 listings starting at $4,995
Used GMC Sierra 1500
77 Great Deals out of 4,221 listings starting at $4,595
Used Ford F-250 Super Duty
18 Great Deals out of 870 listings starting at $6,995
Used Toyota Tundra
10 Great Deals out of 412 listings starting at $8,600
Used Dodge RAM 1500
4 Great Deals out of 171 listings starting at $6,888
Used Toyota Tacoma
22 Great Deals out of 544 listings starting at $1,038
Used Ford Ranger
4 Great Deals out of 1,008 listings starting at $3,900
Used Chevrolet Silverado 2500HD
12 Great Deals out of 846 listings starting at $6,950
Used Ford F-350 Super Duty
30 Great Deals out of 1,640 listings starting at $676
Used Ford Mustang
33 Great Deals out of 1,160 listings starting at $4,450
Used Chevrolet Colorado
7 Great Deals out of 915 listings starting at $3,995
Used Nissan Titan
14 Great Deals out of 411 listings starting at $236
Used Ford Explorer
29 Great Deals out of 1,890 listings starting at $2,995

Used Cars for Sale

2021 Ford F-150 For Sale
84 listings starting at $45,111
2020 Ford F-150 For Sale
5 Great Deals out of 5,240 listings starting at $29,972
2019 Ford F-150 For Sale
11 Great Deals out of 405 listings starting at $28,990
2018 Ford F-150 For Sale
27 Great Deals out of 729 listings starting at $23,500
2017 Ford F-150 For Sale
7 Great Deals out of 341 listings starting at $15,900

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.