2007-01-02 04:13:42 · 3 answers · asked by nick s 1 in Cars & Transportation ➔ Maintenance & Repairs
Disconnect the battery, the negative terminal first, then the positive, right after you park it.
To reconnect, install the positive first, then the negative.
An electrical clock, alarm, pump? is wired to run with the key off. Could be a short, or a drain back through the charging system. Have the charging system tested. Battery could be worn out, low electrolyte level
The alternative is a trickle battery charger, Battery Tender is good
2007-01-02 04:33:04 · answer #1 · answered by cadet 2 · 0⤊ 0⤋
The easiest fix is to drive it a little more often. However, you can easily check the amount of "parasitic" current (amps or amperes) being drawn by the car from the battery when it's parked for several days. The manufacturer's typically specify that no more than 1/4 amp (250 milliamps) be drawn from the battery when parked with all the courtesy lights off etc. You can buy a $15 Volt Ohm Meter (VOM) from Sears, Walmart etc that has a 10 amp scale on it. Select the 10 amp scale setting on the meter and connect its test leads between one of the battery cable clamp connectors you've disconnected and the battery terminal post you disconnected the cable from. The meter should read less than 1/4 amp. If not, pull out only one fuse at a time to see which circuit in the car is drawing too much current.
Of course this all assumes you have a good battery. If your battery is older than 4 years, buy a new one.
PS You have to wait an hour or so after turning the engine off before you can get a proper reading of the parasitic current draw because some electrical in the car shuts down gradually.
2007-01-02 12:33:16 · answer #2 · answered by bobweb 7 · 0⤊ 0⤋
You may have a short wiring or a weak battery, flip the coin or test them both.
draining in one week? if is a short i won't badder looking for it.
it may pop up, by it self ,in the future.
2007-01-02 12:36:24 · answer #3 · answered by Anonymous · 0⤊ 0⤋