Flashing battery light

00GTpony

Member

Mar 10, 2007

162

0

16

Sep 22, 2007

#1

• Sep 22, 2007

• #1

Friends mustang, his battery light is flashing, also car started backfiring along with the flashing light... any ideas ( battery is 2 weeks old )

 

Beasty306GT

Active Member

Dec 19, 2002

671

4

28

Oxford,Mass

Sep 22, 2007

#2

• Sep 22, 2007

• #2

altenator is junk...bring it somewhere to have it tested...

 

00GTpony

Member

Mar 10, 2007

162

0

16

Sep 22, 2007

#3

• Sep 22, 2007

• #3

tested it, working fine, the machine said to change battery... but brand new?... he has alot hooked up to the battery tho, as well as the car, mayb the battery isnt strong enough?

 

jrichker

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Mar 10, 2000

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Dublin GA

Sep 23, 2007

#4

• Sep 23, 2007

• #4

If thr battery voltage drops too low, it will not supply sufficent power to the alternator field windings. Then the alternator will not put out the full 13.8-14.2 volts needed to make everything run good.

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,170

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Massachusetts

Sep 23, 2007

#5

• Sep 23, 2007

• #5

Check voltage of battery when car is idling. Trun all the accessories on and check voltage.

Clean every connection from the batt to the starter solenoid. Replace battery terminals or any cable if questionable. Make sure everything is tight.

Load test the battery.

 

00GTpony

Member

Mar 10, 2007

162

0

16

Sep 23, 2007

#6

• Sep 23, 2007

• #6

load test- done, ide - done, everything past, but the machine said, replace battery. so i dunno