1997 Acura CL Battery Dummy Light on

AARONACURA

MEMBER
1997 ACURA CL
6 CYL
FWD
AUTOMATIC
98,000 MILES

Hello,

replaced a my dead battery about 6 months ago, everything working fine. Recently the battery dummy light came on after starting my car. A moderately loud humming / buzzing / rattling type noise under the hood accompanied it; it's most noticeable when idling and driving under 20mph. The light is consistent. The dash lights are dimmer than usual and the windshield wipers work at about half their normal speed. The car starts fine. Any advice would be greatly appreciated. Thanks guys!

aaron

2 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Lets get the battery and alternator load tested and comeback with the testing results so that we can continue to assist.

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Tuesday, October 13th, 2009 AT 6:33 PM

AARONACURA

MEMBER
6 POSTS

Hello,

i had the battery and alternator tested today. The battery dummy light turned off on the way over, the windshield wipers returned to normal speed and the dash lights came back to full brightness.

Results:

Battery Test:
Voltage: 12.76V
Measured 516 CCA
Rating: 600 CCA

Starter Test:
Cranking Normal
Avg. Voltage: 11.15V
Crank Time: 699MS

Charging System:
Ripple Problem
No Load: 14.39V
Load: 14.01V
Excessive Ripple
INL = Idle No Load
RNL = Rev No Load
ILD = Idle Under Load
RLD = Rev Under Load

the tech at Pep Boys said there's a problem w/ the alternator.

Thanks in advance,
aaron