draining battery
Thread Starter
Burning Brakes
Joined: Apr 2003
Posts: 906
Likes: 0
From: NOVA
draining battery
Something is draining my battery but I cant narrow it down. After a two month trip I go to the garage and try to start the car, it didn't even crank. Went to get a new battery and she fired right up. After a week or two I got a RSR chip installed in my car and she ran fine for a day then the next day she killed the battery just enough to keep the clock running right but not enough to fired the car up. Went to check the battery out again and sure enough it needed replacement
. Now, Im afraid to keep the car connected to the battery when parked because of the battery drainage problem Im facing. Yesterday I connected the new battery and went for a quick drive then I parked for about ten minutes. Came out to the car and it wont crank again, then I disconnected the battery then waited for about five minutes, reconnected the battery then she fired right up. What is happening to my C4? Anyone have a clue?
. Now, Im afraid to keep the car connected to the battery when parked because of the battery drainage problem Im facing. Yesterday I connected the new battery and went for a quick drive then I parked for about ten minutes. Came out to the car and it wont crank again, then I disconnected the battery then waited for about five minutes, reconnected the battery then she fired right up. What is happening to my C4? Anyone have a clue?
Race Car
Joined: Nov 2001
Posts: 4,140
Likes: 1
From: Surrey, UK
The light in the luggage compartment is a common cause - the switches are rubbish, and the light may be staying on even when it's shut.
But - I can't think of much that would drain a battery in 10 mins! Are you sure it was the battery which stopped it cranking? Wouldn't expect it to work again straight after connection if it was.
I suggest you measure current drain at the battery. If it is high - then pull fuses one by one to isolate the circuit which causes it.
But - I can't think of much that would drain a battery in 10 mins! Are you sure it was the battery which stopped it cranking? Wouldn't expect it to work again straight after connection if it was.
I suggest you measure current drain at the battery. If it is high - then pull fuses one by one to isolate the circuit which causes it.
Thread Starter
Burning Brakes
Joined: Apr 2003
Posts: 906
Likes: 0
From: NOVA
Apparently it didn't drain my battery in ten minutes because after disconnecting and waiting for about five minutes, I reconnected the same battery and she fired right up.
Nope, I haven't installed anything new except for the chip.
Nope, I haven't installed anything new except for the chip.
Thread Starter
Burning Brakes
Joined: Apr 2003
Posts: 906
Likes: 0
From: NOVA
I've been thro a new battery every year for the last 3 years. It appears that our cars can be quirky.
Burning Brakes
Joined: Dec 2002
Posts: 938
Likes: 13
From: Windsor, England
Vove,
I had a battery drain issue, and i followed Adrians test method and found the drain . It took about 10 mins .
Basically you hook up a multimeter between the +ve batt term and the +ve batt lead .
Anything above 20ma and you have a drain. mine was 50ma. Then start pulling fuses and watch for a current drop. Mine was the interior fan (fuse 1? - i had started at fuse 40, of course), as soon as i pulled it the current dropped to 16ma.
Search the list for Adrians proper instructions, they work like a charm
I had a battery drain issue, and i followed Adrians test method and found the drain . It took about 10 mins .
Basically you hook up a multimeter between the +ve batt term and the +ve batt lead .
Anything above 20ma and you have a drain. mine was 50ma. Then start pulling fuses and watch for a current drop. Mine was the interior fan (fuse 1? - i had started at fuse 40, of course), as soon as i pulled it the current dropped to 16ma.
Search the list for Adrians proper instructions, they work like a charm
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Three Wheelin'
Joined: Mar 2003
Posts: 1,402
Likes: 1
From: New Jersey
I had drain from fuse 1 as well- turned out to be my climate control unit, which I had rebuilt at otto's of Venice. Now, car can sit several weeks, and starts right up with no problems...just like my old '87 911 used to. In the winter when the car will sit for more than a month, I use the Porsche Battery Maintainer...
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