My mustang battery gauge go down when I stop at a light

20

Asked by Jul 30, 2013 at 06:48 PM about the 2006 Ford Mustang GT Deluxe Convertible

Question type: Maintenance & Repair

I have a new alt and battery and the
problem still there. Anyone know what it
could be?

12 Answers

if it is a "NEW" battery must be the 1/0 cable as it attaches to the frame break out the coarse wirebrush and clean and re-assemble this connection and the 1/0 battery cable going to the motor block (near the alternator)....these should be comfortable with pullin' 300 cold cranking amps~

if you believe there to be a parasitic drain, you can test for this~ http://www.youtube.com/watch?v=KF1gijj03_0

1 out of 1 people think this is helpful.

your alternator belt could be loose~

idle speed is too low~

Best Answer
20

Idle speed is too low... that sound interesting how would make turn the idle speed up

seems these are fully computer integrated...would have to research how to do this...mostly chooses the idle speed based on prevailing conditions (i.e. A/C switched on) it is really not hurting anything if is relying on the power of mostly the battery as when you get goin' again will replenish immediately...the dim headlights are a concern, as it represents a faulty ground yet~

20

Maybe a ground could be the problem. It only happen if I turn the lights on or radio I replace the battey and alt and the problem still there. A few people told me it could be the underdrive pulleys. But I dont see how a pully would cause that

1 out of 1 people think this is helpful.

no buddy, it's the 1/0 battery cable as it attaches to the frame...what most people DO NOT know is that this connection "welds" itself with each use...pulling so much amperage is just like an electric welder and punches this connection red hot and hopefully fuses it together (with no contaminants)...but often is THE source for "Brown power" as the poor ECU perhaps 75o mA device gets it's ground by this partially correct offering varying amperages and varying voltages creating a "Brownout" condition....this is why I like the old ways~ buggy and whip~

...as I was saying this 1/0 connection will WELD itself...and in that light probably DO want the larges area in contact...use a coarse, unfriendly wire brush on the contact surfaces...be lucky if we get a quarter sized area in contact~

20

Sorry im having problem understand ing was a 1/0 connection? Are we talking about the positive cable or negative? Thanks for the help your giving me sir

the 1/0 cable is the HIgh amperage cable what is used to connect to the battery...both negative and positive...both must be free of corrosion....but the black one that connects to the chassis/frame is the one of concern~

1 out of 1 people think this is helpful.

http://custombatterycables.com/what_size_cable_do_you_need.htm

Your Answer

Add photo

Related Questions

Mustang

Looking for a Used Mustang in your area?

CarGurus has 45,641 nationwide Mustang listings starting at $1,999.

ZIP:

Search Ford Mustang Questions

Ford Mustang Experts

#1 Tom Demyan
Tom Demyan
Reputation 4,270
#2 Bob Beaman
Bob Beaman
Reputation 1,210
#3 COMETGUY61
COMETGUY61
Reputation 1,060
View All

Related Models For Sale

Used Dodge Charger
397 Great Deals out of 28,096 listings starting at $1,988
Used Chevrolet Corvette
121 Great Deals out of 20,599 listings starting at $3,000
Used Ford Shelby GT500
552 listings starting at $23,500
Used Ford F-150
2,178 Great Deals out of 206,277 listings starting at $1,499
Used BMW 3 Series
981 Great Deals out of 31,676 listings starting at $1,000
Used Jeep Wrangler
270 Great Deals out of 18,084 listings starting at $2,950
Used Chevrolet Silverado 1500
1,684 Great Deals out of 174,972 listings starting at $1,250
Used Nissan 350Z
66 Great Deals out of 1,230 listings starting at $2,595
Used Honda Civic
634 Great Deals out of 88,620 listings starting at $995
Used BMW M3
44 Great Deals out of 1,524 listings starting at $5,800

Used Cars For Sale

2017 Ford Mustang For Sale
30 Great Deals out of 23,132 listings starting at $18,779
2016 Ford Mustang For Sale
147 Great Deals out of 5,252 listings starting at $16,995
2015 Ford Mustang For Sale
61 Great Deals out of 3,516 listings starting at $13,988
2014 Ford Mustang For Sale
53 Great Deals out of 3,124 listings starting at $9,000

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.