2007 mazda cx 7 battery light on and the battery is not charging I change alternator 3 times but still not charging battery get hot and is there any ground for the alternator which causing this o

10

Asked by Dec 05, 2015 at 09:07 PM about the 2007 Mazda CX-7 Sport AWD

Question type: Maintenance & Repair

5 Answers

76,305

Sounds like the battery has a short in it. Have the battery checked, probably needs to be replaced.

10

i have change battery but still no charging

76,305

I am not real familiar with that one, when you say the battery was getting hot is an indication of over-charging then if the batter is in good shape. The alternator is automatically grounded when mounted. I think there is a problem with the regulator. The battery getting hot = overcharging, light on the dash and overcharging is caused by the regulator. The regulator is either a separate unit, or it is in the alternator. So have you put a volt meter across the battery terminals to read DC volts? It should show 14.2 to 14.5 volts when charging.

10

it drains the battery power am suspecting the ecm is not controlling the alternator

1 of 1 people found this helpful.
76,305

The charging system is its own system that supplies power for everything. The only thing controlling the alternator is the regulator. To narrow down a draw on the battery you are going to need a volt meter. First off, take the neg. cable off the battery and check with the volt meter between the cable and the battery post, see what it reads. There is always some my-newt amount of voltage, should not exceed like .7V. If it does and you suspect the draw coming from the charging system, take the positive lead off the alternator, and don't let it touch ground. Keep the neg. off the battery while doing this. Now check between the neg. cable and battery post. If there was voltage, it show that it dropped.

Your Answer

CX-7

Looking for a Used CX-7 in your area?

CarGurus has 1,179 nationwide CX-7 listings starting at $1,500.

ZIP:

Mazda CX-7 Experts

  • #1
    Rudy_1
    Reputation
    480
  • #2
    Bern
    Reputation
    260
  • #3
    taxcode
    Reputation
    120
View All

Related Models For Sale

Used Mazda CX-9
113 Great Deals out of 10,367 listings starting at $2,950
Used Nissan Murano
419 Great Deals out of 23,160 listings starting at $400
Used Honda CR-V
886 Great Deals out of 59,635 listings starting at $1,495
Used Toyota RAV4
813 Great Deals out of 52,893 listings starting at $1,600
Used Nissan Rogue
835 Great Deals out of 67,888 listings starting at $2,110
Used Toyota Camry
1,073 Great Deals out of 86,817 listings starting at $800
Used Mazda MAZDA3
333 Great Deals out of 27,786 listings starting at $899
Used Honda Accord
1,101 Great Deals out of 73,575 listings starting at $1,100
Used Mazda MAZDA6
195 Great Deals out of 11,181 listings starting at $700
Used Ford Escape
1,271 Great Deals out of 103,796 listings starting at $1,200
Used Hyundai Santa Fe
281 Great Deals out of 18,438 listings starting at $1,995
Used Ford Edge
1,067 Great Deals out of 51,724 listings starting at $2,150
Used Acura MDX
483 Great Deals out of 16,228 listings starting at $2,000
Used Chevrolet Equinox
1,119 Great Deals out of 69,551 listings starting at $760

Used Cars For Sale

2009 Mazda CX-7 Sport AWD For Sale
6 listings starting at $4,995
2008 Mazda CX-7 Sport AWD For Sale
11 listings starting at $4,995

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.