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

330

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.

330

charging 2

330

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

5,885

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

    -

    General

  • Why wont truck keep running after I disconnect jumper cables? 5 answers

    2001 Ford F-150 XLT Extended Cab SB

    -

    General

  • 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

    -

    General

  • 2016 Ford F150 key code 13 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

    -

    General

  • 2001 F-150 won't hold charge/new battery 2 answers

    If the truck sits, even for a day, it won't hold a charge to start again. The battery is new. Has a newer starter, tested the alternator- it's good. Have had people suggest that it may be a ground, ...

    2001 Ford F-150 XL Extended Cab 4WD SB

    -

    Maintenance & Repair

F-150

Looking for a Used F-150 in your area?

CarGurus has 212,369 nationwide F-150 listings starting at $1,000.

ZIP:

Search Ford F-150 Questions

Ford F-150 Experts

#1 OJ
OJ
Reputation 6,980
#2 dandyoun
dandyoun
Reputation 4,180
#3 tennisshoes
tennisshoes
Reputation 2,520
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,298 Great Deals out of 155,159 listings starting at $1,395
Used GMC Sierra 1500
941 Great Deals out of 62,271 listings starting at $1,395
Used Dodge Ram 1500
530 Great Deals out of 12,828 listings starting at $1,995
Used Ford F-250 Super Duty
397 Great Deals out of 45,060 listings starting at $2,000
Used Toyota Tundra
588 Great Deals out of 30,722 listings starting at $2,637
Used Toyota Tacoma
620 Great Deals out of 35,105 listings starting at $2,155
Used Ford Mustang
364 Great Deals out of 44,400 listings starting at $1,000
Used Nissan Titan
222 Great Deals out of 16,972 listings starting at $3,999
Used Ford Explorer
939 Great Deals out of 73,806 listings starting at $750
Used Chevrolet Tahoe
778 Great Deals out of 28,448 listings starting at $1,500
Used Chevrolet Colorado
264 Great Deals out of 19,414 listings starting at $1,995
Used Ford Ranger
203 Great Deals out of 6,719 listings starting at $1,450
Used Jeep Wrangler
393 Great Deals out of 19,086 listings starting at $3,000

Used Cars For Sale

2017 Ford F-150 For Sale
4 Great Deals out of 103,478 listings starting at $18,199
2016 Ford F-150 For Sale
154 Great Deals out of 41,651 listings starting at $16,995
2015 Ford F-150 For Sale
197 Great Deals out of 7,255 listings starting at $17,480
2014 Ford F-150 For Sale
433 Great Deals out of 11,727 listings starting at $10,700