Check and test sensor switch and circuit for a short pull fuse sometimes resets sensor
SOURCE: 1989 caddy deville Leveling system override?
Pull the relay for it. Listen for it clicking on passenger side.
SOURCE: 1980 caddy coupe deville has
Something is staying on after the key is turned off. easy way to find out what is staying energized is pull all fuses, disconect the battery, then put the amp meter in line with the positive side of the system between the positive battery post and the positive cable end. then put the fuses back in one at a time a see which one draws one or two amps. that will lead you to the draw down circuit. If nothing is pulling the battery down then the battery is not getting a full charge. Check the ground conection at the motor side of the cable and also the ground strap between the motor and the firewall
SOURCE: My 77 coupe deville keeps draining the battery.i
To begin with, please don't ever disconnect the battery cable with the engine running. You can cook the alternator and the computer.
Have you pulled the fuses and disconnected everything to check for a drain ?
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