Shoul I undo the battery

Thje battery is still being drained by the computers on board.Try buying a trickle charger when you are not using the battery.My wifes Toyota sypder which I just sold was a 2000 model with 14,000 miles.Again 14,000 miles.I went thru a few batteries till I bought a trickle charger.

take the air temp sensor off. and leave in warm house. till at your homes warm temp then go out and install the sensor.and start engine. if it starts this is your problem.

+ symbol is positive and - symbol is negative.. It should be the ( Black ) color cable on battery ..( Red )cable is positive + it shoul be stamped on the battery top or on side near terminals

put the battery on charge overnight and then try to start tomorrow ,i think it just ahs a flat battery and nothing more is wrong ,use a trickle charger and leave it on for a least 12 hours

If you just installed the battery then it may need to be charged. Use a trickle charger and leave it on till it is done.

with a trickle charger you can connect to any wire that goes to the battery as long as there is no circuit between the charger and the batt

Yes to both questions. the charger must sense 41.5 volts to activate the relay inside the charger. Being a repair shop, I have a charger that is rigged to charge even DEAD batteries. I do not recommend this for the novice. A charger set on 12 volts will bring the batteries back up to 8.2-8.6 volts. A cheap trickle charger may not put out enough to charge a battery of this size. Remember that they are used to MAINTAIN a charge. Connect the Voltmeter and watch for voltage rise. If it rises to 8.1 or above, it is charging. Trojan battery company recommends charging at least once a month.

If the battery is completely dead a trickle charge won't do much. These are designed to keep a good battery good. You need a regular battery charger set to 10 amps for a couple hours then 2 amps overnight. Be aware that sometimes if your battery has been completely killed it may not work for long, that is your car will start but within a few days or hours it will leave you stranded. You'll know because it will drag when you try to start it. Sometimes you get lucky and it works great for years.

Next time do use a trickle charger! Also if the charge you use is automatic then you can leave it hooked up in 2 amp mode when you are gone. Good luck!

On some of the older style GM's you can take that brown wire and cut it and take the end leading from the alternator and hook it directly to the hot terminal on the alternator and just leave it hooked up and it will work. But I have ran into the occasional problem where leaving it hooked up will drain the battery when the vehicle isn't running. Hope this helps..

Sometimes it takes MUCH longer than the 4 hours (up to 8).
Neat system, huh? By the time it resets, your battery is dead and it will shut off again!!! No wonder the stock radio hardly ever gets stolen. Put a trickle charger on the battery, and leave it on for longer. (Make sure your insurance covers theft lol, I did it once and forgot that the key was in my car in the driveway for a full day)