Do we have Ghosts?

[Peg Jack]

Problem: Door side scare light is staying on even after DH disconnected the wires to the switch. It has worked in the passed so we know we are using the right switch to turn on & off. Called the dealer and he was puzzled, he said to check wiring which we did, take out the bulb, which we don't want to do in case of breaking a good seal around fixture. Since we are closing up end of month we will take out the battery, but what could be the solution? Anyone have any ideas?