Be sure to have a thorough look at all of the facilities, including trunk and glove box lights. One of the switches could be faulty, allowing the lamp to remain on even with the trunk or glove box closed.

With the wire removed, what no-longer works?
If you don't notice anything which has stopped wprking, just tape the wire up and forget it.

__________________
Tony from West Oz.
Fatmobile 3 84 300D 295kkm Silver grey/Blue int. 2 tank WVO - Recipient of TurboDesel engine.
Josephine '82 300D 390kkm White/Palamino int.
Elizabeth '81 280E, sporting a '79 300D engine.
Lucille '87 W124 300D non-turbo 6 cylinder OM603, Pearl Grey with light grey interior


Various parts cars including 280E, 230C & 300D in various states of disassembly.