I believe its under the rear seat.
unpluge & repluge the negative terminal of yr battery.
Disconnect the negative cable first and connect the same negative terminal last when installing the new battery.
There are eight steps on how to replace an AC condenser on a 1998 Cadillac Deville. Some of the step-by-step instructions are disconnect the battery by turning the terminal bolts counterclockwise, place the positive bolt away from the battery, and then disconnect the wiring harness.
undo battery cables from battery and hold posotive and negative together for 5 minutes or so
The negative terminal of a battery has a - sign and positive terminal has a + sign.
The battery is located under the rear seat.
its under the back seat....
Under the battery tray
To replace the horn on a 1999 Cadillac DeVille Concours, first, disconnect the negative battery terminal to ensure safety. Remove the engine cover if necessary, then locate the horn, which is typically mounted behind the front grille or in the engine compartment. Disconnect the wiring harness from the horn and unbolt it from its mount. Install the new horn by reversing the steps, ensuring all connections are secure before reconnecting the battery.
To charge the battery in a 2005 Cadillac, first ensure the vehicle is off and locate the battery, which is typically found in the trunk or under the hood, depending on the model. Connect the positive (red) jumper cable to the positive terminal of the battery and the other end to a charged battery or a jump starter. Then, connect the negative (black) jumper cable to the negative terminal of the charged battery and attach the other end to a grounded metal surface on the Cadillac. Start the charging vehicle or jump starter, and let it charge for a while before attempting to start the Cadillac.
The negative battery terminal is on the battery. They don't have a wire coming from it like they do the positive. For charging purposes, the engine block acts as the battery ground. When disconnecting the negative at the battery, the negative terminal usually has a black wire and the positive has a red.
To change the battery of a 2008 Cadillac STS, first ensure the vehicle is turned off and parked on a flat surface. Open the hood and locate the battery; disconnect the negative terminal (black) first to prevent any electrical shorts, followed by the positive terminal (red). Remove any securing brackets, then lift out the old battery and replace it with a new one, connecting the positive terminal first and then the negative. Finally, secure the battery and close the hood.