I know several people on this board have C5's. I've had battery problems with my 98 convertible which doesn't get driven much. That, of dourse, is most of the problem. Anyway, I put a new battery in it this morning, and with the engine running I get about 13.2-13.5 volts. Occassionally the reading will drop to about 12.5 for just a half second, like a relay was kicking in or something. Is this normal? I would expect to see a little higher voltage. Like 14.7-15.2 on the older cars. Do these new cars run a lower voltage?
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Re: C5 battery question
thats what mine runs in the 13teens. my battery will still start the car even setting for 4 weeks. pull the key out of the ignition when you park the car as the draw is more with the key in. also check to make sure your glove box light goes off.
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Re: C5 battery question
Mine runs in the same range and it will start after sitting all winter. If you read the owner's manual they tell you to disable the keyless entry deal if the car is going to sit more than 3 weeks because that will draw the battery down but I have never done that and it sits a lot more than 3 weeks at a time.
Round 2 of Viper Wars, this AM. No one showed but me. Guess I have 'em on the run... ;)
JPComment
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Re: C5 battery question
This one has sat for several weeks at a time on several occcassions, without anything disabled. Teh battery has run down to the point that it would not start the car several times. The new battery does ok for now, and I checked the alternator-putting out 13.6 volts. Guess I'll see what happens and encourage my wife to get out more. THanks for the info.Comment
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Re: C5 battery question
For more diffinitive answers to your C5 questions visit the C5 Registry at www.c5registry.com. Even the Plant and other GM Officials participate.Comment
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Re: C5 battery question
Battery life is problematic on modern cars that are infrequently driven because of the current draw from the engine management system, alarms, keyless entry systems, etc. After several weeks the battery may be down 20 to 40 percent on total energy, but may still deliver enough current to start the car. The trouble with this is that batteries have a "chemical memory" and if forced to deliver high current in a discharged state will eventually never come back up to full energy. The result is short battery life. The cure is either to charge the battery before attempting to start, or keep a "battery tender" device connnected when the car is not in use.
DukeComment
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