why cant my truck hold a charge?


Asked by Jan 14, 2016 at 11:16 AM about the 2003 Ford F-150

Question type: General

i own a f-150 XLT trition v8. i have a new battery and altenator. when i charge
the battery it will start and run, then the battery life will slowly drop down to
nothing and the truck dies.

5 Answers


I'd have to check wiring circuits for battery and generator. It sounds like the charging system isn't working for some reason. With a fully charged battery, everything off, use a digital voltage meter across battery posts, note the reading. Then start the vehicle, take second reading across battery posts, the second reading should be higher than the first if charging system working. Does your charge lite on the dash work? With engine running, it's the alternator that should carry the load. The charging system has fusible links and fuses.


charging 2


Another thought is excessive amp draw with everything off, draining the battery?


If your charging system turns out to be charging properly, check for dirty cables/terminal but if everything turns out to be ok, disconnect battery with everything off and try just touching battery post with the terminal and see if you see a big arc, if you do, you may have something shorted or left on that's causing your battery to drain


It is not charging properly, only putting out approx. 10 to 11 volts, not near enough, it should be about 14.5v. min. The battery alone with all off shows 12.5v

Your Answer

Add photo

Related Questions

  • Why is the charge gauge on my 1985 ford f150 reading very high? 3 answers

    After I installed a new alternator in my 1985 Ford F150 about a month & half ago the charge gauge started to fluctuate, a mechanic friend checked the voltage & said it was fine. Last weekend my daug...

    1985 Ford F-150



  • 2006 ford f-150 4 answers

    I have a 2006 ford f-150 xlt v-8 2-wd. It recently got very cold out as I live in Ohio. I went out one day and it took a little longer than usually to get my truck to turn over and start. The next day...

    2006 Ford F-150 XLT Styleside 4WD



  • 2016 Ford F150 key code 11 answers

    Does anyone know how I can retrieve the key code for my 2016 F150? The dealer sold it to me without the card and now wants to charge me to retrieve it.

    2016 Ford F-150 XL LB 4WD



  • a/c question 2 answers

    I have a 1994 ford f150 with a 5.0l the a/c clutch was not in gaging so jumped a wire from batt to the hot sid of the plug on the compressor. Then the clutch in gaged. The plug was not getting pow...

    1994 Ford F-150 XLT 4WD SB



  • battery light on and alternator is charging 3 answers

    05 ford f-150 4.6 v8,, after about 5-seconds starting the truck the battery light comes on and remains on during the duration of driving,, I am buying the truck but it already has a brand new alternat...

    2005 Ford F-150 XLT SuperCab


    Maintenance & Repair


Looking for a Used F-150 in your area?

CarGurus has 216,438 nationwide F-150 listings starting at $1,000.


Search Ford F-150 Questions

Ford F-150 Experts

#1 OJ
Reputation 6,000
#2 dandyoun
Reputation 3,880
#3 tennisshoes
Reputation 2,300
View All

Related Models For Sale

Used Chevrolet Silverado 1500"
2,451 Great Deals out of 144,012 listings starting at $1,995
Used GMC Sierra 1500"
1,028 Great Deals out of 56,350 listings starting at $2,400
Used Dodge Ram 1500"
517 Great Deals out of 13,858 listings starting at $995
Used Ford F-250 Super Duty"
454 Great Deals out of 42,777 listings starting at $1,000
Used Toyota Tundra"
617 Great Deals out of 26,462 listings starting at $2,500
Used Toyota Tacoma"
651 Great Deals out of 30,299 listings starting at $2,850
Used Ford Mustang"
743 Great Deals out of 41,405 listings starting at $900
Used Nissan Titan"
227 Great Deals out of 13,219 listings starting at $4,500
Used Ford Ranger"
260 Great Deals out of 7,800 listings starting at $988
Used Ford Explorer"
1,347 Great Deals out of 71,768 listings starting at $300
Used Chevrolet Tahoe"
1,121 Great Deals out of 36,357 listings starting at $1,700
Used Chevrolet Colorado"
321 Great Deals out of 17,586 listings starting at $2,495
Used Nissan Frontier"
445 Great Deals out of 20,684 listings starting at $2,500

Used Cars For Sale

2017 Ford F-150 For Sale
6,695 listings starting at $17,015
2016 Ford F-150 For Sale
150 Great Deals out of 137,952 listings starting at $16,985
2015 Ford F-150 For Sale
236 Great Deals out of 8,956 listings starting at $17,958
2014 Ford F-150 For Sale
489 Great Deals out of 10,908 listings starting at $10,450
2013 Ford F-150 For Sale
696 Great Deals out of 14,711 listings starting at $7,727