Question about 2002 Cadillac Deville

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The car wont keep a charge after disconnecting the negative terminal for about 5 minutes to replace a CD player now the car keeps going dead. negative terminal was securely put back on besides the CD player nothing else was disconnected except the back seat.

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You might try driving it to see if it will relearn,but most likely will have to go to the dealer to have the computer relearned,it has lost it`s program from power loss to the car,when you disconnected the battery cable.

Posted on Jul 20, 2010


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2005 Mercury grand Marquis battery died won't start trying to jump is there a safety switch or a reset button

  1. Start the working vehicle.
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start engine then disconnect the neg terminal ,if engine stops a charging problem ,if engine keeps running its a battery problem

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Find the battery drain. Disconnect negative cable from battery. Place test light between pattery negative post and disconnected negative cable. If light is bright while no accessories are on, there is a drain. While keeping the test light in this configuration, pull each fuse out and replace on at a time while watching test light. If the light dims or goes out when a particular fuse is out, that identifies which circuit has the drain. Use that information to track down what is on or draining.

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Brand new battery, wants to turn over but keeps losing its charge, the break lights only turn off if you lift the pedal after u use it, alternater belt squeaks a little. wat could cause this when the...

Well, if the alternator belt squeaks a little, it cannot be actually charging properly, resolve that...

First steps would be to fully charge the battery and measure the voltage. Turn of vehicle Disconnect the negative terminal overnight, for a night or two.

If battery still dead, focus on the battery.
If battery is not dead, put a volt meter between the negative terminal and cable and measure voltage... do not be mislead by interior lights, or clock, pull those fuses, during testing...

Anyways, keep going until you find a drain.

The alternator has diodes that can cause a drain...disconnect for testing purposes...

NEVER run the vehicle with the battery cable dicsonnected.


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Left lights on Suzuki Vitara and now can not unlock the door

Can't help with a problem of getting into the car, assuming the keys don't work. As for charging the battery, make sure all accessories are off in both cars, hook up the cables to the dead battery first, noting which one goes to the + cable on the battery. That same cable will go to the + terminal on the car that is running. Make the last connection the one that goes to the - terminal on the running car.
Let the battery charge for 2-3 minutes and then try to start. If it doesn't start after 5 minutes, rev the engine on the jump car and that will add voltage to the connection. Try to start again after a few minutes. After you get it going, let your car run for 20 minutes to build up the battery. When disconnecting the cables, keep the ends from touching until all cables are disconnected from the batteries.

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I ran my battery dead and now my cd player wont work, just the radio. I installed a new battery on my 2002 sunfirwe and now the cd player does not work. It has a cd in it but will not eject or play.

Disconnect the negative battery cable at the battery for 10 minutes. Reconnect the terminal and recheck CD player.
Let me know and we can go from there.

Feb 26, 2009 | 2002 Pontiac Sunfire

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