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

72,145

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

72,145

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.
72,145

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

Add photo

Related Questions

CX-7

Looking for a Used CX-7 in your area?

CarGurus has 1,296 nationwide CX-7 listings starting at $1,988.

ZIP:

Search Mazda CX-7 Questions

Mazda CX-7 Experts

#1 Rudy_1
Rudy_1
Reputation 430
#2 Bern
Bern
Reputation 260
#3 taxcode
taxcode
Reputation 120
View All

Related Models For Sale

Used Mazda CX-9
101 Great Deals out of 7,749 listings starting at $3,999
Used Honda CR-V
1,030 Great Deals out of 57,426 listings starting at $1,000
Used Nissan Rogue
573 Great Deals out of 66,668 listings starting at $1,900
Used Toyota RAV4
888 Great Deals out of 64,806 listings starting at $1,990
Used Nissan Murano
411 Great Deals out of 25,357 listings starting at $1,499
Used Mazda MAZDA6
203 Great Deals out of 14,739 listings starting at $1,395
Used Mazda MAZDA3
404 Great Deals out of 29,382 listings starting at $1,495
Used Hyundai Santa Fe
252 Great Deals out of 15,344 listings starting at $1,500
Used Ford Edge
808 Great Deals out of 48,042 listings starting at $2,990
Used Chevrolet Equinox
1,053 Great Deals out of 88,851 listings starting at $1,995
Used Ford Escape
1,353 Great Deals out of 85,082 listings starting at $950
Used Toyota Camry
1,233 Great Deals out of 85,027 listings starting at $750
Used Toyota Highlander
390 Great Deals out of 26,423 listings starting at $2,500

Used Cars For Sale

2009 Mazda CX-7 Sport AWD For Sale
4 listings starting at $5,999
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.