HomeAll RepliesReply To: 1994 Cadillac Deville All Exterior Lights Not Working Reply To: 1994 Cadillac Deville All Exterior Lights Not Working Sponsored November 26, 2021 at 7:41 pm #681841 andyliuParticipant According to your description, the fuse of the lighting system may have been blown. You can check it first, if yes, replace a new one, the problem can be solved. Hope the above suggestions are helpful to you. Sponsored Subscribe to GM Authority For around-the-clock GM news coverage We'll send you one email per day with the latest GM news. It's totally free. First Name Last Name Email Address Subscribe via Email Leave this field empty if you're human: Sponsored