What could make my battery light come on only at 40 mph and below?

Asked by Oct 20, 2014 at 07:16 PM about the 1995 Honda Civic

Question type: Maintenance & Repair

When my speed drops below 40 mph
my battery light comes on and stays
on when at a stop, until I start
accelerating again. Also when the
light does come on (below 40 mph) I
can make it turn off by turning
something on like my heater, head
lights, etc. Pretty much anything that
draws power. I tested voltage at my
battery with engine off- 12.9 volts.
With engine on- 14.2 volts. But when
the battery light is on I see below 13
volts as if the alternator wasnt
working. My alternator is brand new
not remanufactured and I installed it
yesterday. Battery is 5 months old
optima yellow top. Please help me
out. Any suggestions are greatly
appreciated.

1 Answer

75

Bad alternator

1 of 1 people found this helpful.

Your Answer

Honda Civic Experts

  • #1
    Tom Demyan
    Reputation
    1,050
  • #2
    Takoda Fraser
    Reputation
    1,030
  • #3
    Jonathan Ford
    Reputation
    990
View All

Related Models For Sale

Used Honda Accord
1,032 Great Deals out of 60,523 listings starting at $999
Used Honda Civic Coupe
222 Great Deals out of 14,479 listings starting at $1,495
Used Toyota Corolla
869 Great Deals out of 56,853 listings starting at $1,099
Used Toyota Camry
1,046 Great Deals out of 68,981 listings starting at $295
Used Honda CR-V
790 Great Deals out of 53,407 listings starting at $1,750
Used Nissan Altima
990 Great Deals out of 74,664 listings starting at $1,500
Used Hyundai Elantra
478 Great Deals out of 41,022 listings starting at $1,995
Used Honda Accord Coupe
150 Great Deals out of 9,168 listings starting at $1,500
Used Ford Mustang
712 Great Deals out of 38,398 listings starting at $895
Used BMW 3 Series
1,116 Great Deals out of 32,629 listings starting at $1,000
Used Hyundai Sonata
716 Great Deals out of 49,081 listings starting at $790

Used Cars For Sale

2017 Honda Civic For Sale
10 Great Deals out of 48,892 listings starting at $16,393
2016 Honda Civic For Sale
75 Great Deals out of 2,372 listings starting at $12,395
2015 Honda Civic For Sale
116 Great Deals out of 3,909 listings starting at $8,991
2014 Honda Civic For Sale
258 Great Deals out of 6,029 listings starting at $7,600
2013 Honda Civic For Sale
81 Great Deals out of 1,717 listings starting at $6,980

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.