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
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.
disconnect negative then positive remove rubber hold down and pull out
The positive end of a battery goes to the positive end of the terminal. In retro spec, the negative end of a battery goes to the negative end of the terminal.
I have a 2000 Deville DTS. The battery is located below the back seat. Just pull up the seat (not back), and you will find the battery.