You don't say which car, but most have a slider switch. One position gives you a map l;ight, one shuts the dome light off completely and one psoition allows the dome light to come on when the doors are open. Is your switch set correctly?

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Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon TDI...at least its a diesel

Non illegitemae carborundum.