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Username Post: 1965 Impala SS problem with the battery keeping charge        (Topic#364086)
Posts: 2

Reg: 12-19-20
01-22-21 06:29 PM - Post#2812668    

Hi I am wondering if any one know what can be the problem with my 65 the battery wont keep charge and I already changed the alternator. Does any one know what else could it be?


"7th Year" Gold Supporting Member
Posts: 421
Loc: Mankato, MN
Reg: 11-23-09
01-22-21 09:34 PM - Post#2812676    
    In response to Yruiz

In the old days, the console clock could drain a battery in short order. You may also have a glove box or trunk light staying on.

1965 Impala SS Coupe
Regal Red with Black Interior
L74 327
3.31 Open, 12 bolt

65-66 FSCC #512
NIA #2832

Posts: 36

Reg: 09-24-20
01-23-21 12:00 AM - Post#2812690    
    In response to Yruiz

There are several things that can run down a battery. The alternator not charging, bad or dirty connections from or to the alternator or battery, bad battery, an excessive draw on the battery from some source. How old is the battery? Did you do a load test on the battery after fully charging it? Have you done a milliamp draw test on the vehicle to see if you have something draining the battery. Depending on the vehicle and any aftermarket accessories added, there is always a certain amount of draw from the battery for things like clocks, radio memory, alarm systems, etc. Changing out parts without knowing the issue can waste lots of money and time. So I would check that the connection are clean and tight, verify that the charging system is charging, load test the battery, and perform a milliamp draw test. One of those is going to tell you what the issue is. If you need help with those test, you should ask someone here and locally for help before you start spending more money.

Site Ambassador
Posts: 15027

Loc: Baltimore, MD
Reg: 11-27-04
01-23-21 07:34 AM - Post#2812719    
    In response to Impalas4ever

Disconnect the positive battery cable and clip a test light to the cable terminal and touch it to the positive post. If it lights, you have a draw. The clock usually isn’t enough of a draw to make the test light light up. If you have a draw, start pulling fuses. When the light goes out you will know which circuit it is on and can check all of the components on that circuit. If the light doesn’t light you will have to move on to a milliamp test to check for smaller draws. If your battery is charged and passes a load test it shouldn’t die that quickly from a small draw.

Friends don’t let friends drive Fords.

1999 Silverado Z71 4X4 extra-cab short bed
1983 Malibu Fauxmad - tubbed
1978 El Camino Kustomized
1972 Monte Carlo
1957 210 handyman wagon
1957 Nomad sport wagon
1957 Cameo Carrier

"17th Year" Platinum Supporting Member & Senior Moderator
Posts: 14726
Age: 74
Loc: St. Louis, MO
Reg: 12-11-03
02-07-21 11:51 AM - Post#2813801    
    In response to wagonman100

The clock won’t drain the battery until the points in the clock close and the solenoid winds the clock movement. In my case, the points fused together and burned the coil. You’ll smell the smoke when that happens.

Tom 65-70 Full Size Team Moderator

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65 Impala SS Tahitian Turquoise

Member #212 "20th Year" Gold Supporting Member
Posts: 2433
Age: 60
Loc: Surprise Az USA
Reg: 04-07-00
02-12-21 06:20 PM - Post#2814184    
    In response to Yruiz

How old is the battery?

Bill H.
67 SS


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