dead battery
Thread Starter
Le Mans Master
Joined: May 2005
Posts: 6,633
Likes: 793
From: FORT LAUDERDALE FL
dead battery
i have an 04 vert, 4k miles. twice since march battery has gone dead after the car sits a couple of weeks. i have other vehicles that sit for weeks at a time, no dead battery. what is taking the battery down? anyone know or have this problem...this is a new car!!!!
thanks
thanks
Instructor
Joined: Feb 2004
Posts: 229
Likes: 0
From: Boynton Beach, FL FL
same thing happened to me after a 2 week vacation. this is typical for these cars, seems to be a lot of parasitic draw from all the electronics. I got a battery tender and just hook it up when I go away and no problems when I return. Cheapest way to fix the problem....HTH,
Racer
Joined: Jul 2004
Posts: 405
Likes: 0
From: Colorado Springs CO.
Originally Posted by jimmie jam
i have an 04 vert, 4k miles. twice since march battery has gone dead after the car sits a couple of weeks. i have other vehicles that sit for weeks at a time, no dead battery. what is taking the battery down? anyone know or have this problem...this is a new car!!!!
Safety Car
Joined: Jun 2003
Posts: 4,640
Likes: 0
From: Sunshine State
Originally Posted by lanceg1041
I got a battery tender and just hook it up when I go away and no problems when I return. Cheapest way to fix the problem....HTH,
Le Mans Master
Joined: Nov 2003
Posts: 8,003
Likes: 248
From: Tampa Fl
St. Jude Donor '12-'13-'14
Ive had the same problem, but it only happens after the three week mark. I think the batteries are good for 25 days without a start. Mind has failed in the winter at the 21 day mark. In the winter, if it snows, I throw a charger on it while I shovel the driver even if I dont use the car. I pretty make sure if I dont use the car by the 3rd weekend, I have to something to the battery.
Burning Brakes
Joined: Jul 2004
Posts: 1,119
Likes: 0
From: Spring Branch Texas
Originally Posted by C5-BRUCE
Although this happens to a bunch of cars, it's not normal. Check things like radar detectors that are not turned off, and a loose glove box door that leaves the light on. A notorious cause is the security system. If you lock the car using the FOB, the system draws power continuously. If you lock the car with the key, it doesn't draw power. Give it a try next time and see if it helps. But yes, a battery tender is clearly indicated.
Excessive parasitic drain is not normal on these cars. As C5-BRUCE indicated, check the obvious. Sometimes it is tough to track down the drain. If you have a multi-meter, watch the draw on the battery and start pulling fuses. When you see the drain drop, you've found the parasitic source. 
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
If you have an 04 and the batteries are draining at that rate, get it into the dealer and let them fix it! My 02 Z06 sits in the garage and will start after two months of sitting! Something is wrong and needs to be fixed. They can test the electrical system for parasitic drain and see if it is abnormal.
BC
BC
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