One problem related to dash wiring has been reported for the 2004 Cadillac Deville. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Cadillac Deville based on all problems reported for the 2004 Deville.
The vehicle's emergency flashers and turn signal lights continuously blew out without warning. Upon inspection of the vehicle, the dealership has found bare wiring in the wall between the motor and the dashboard, where the wires have been pulled through. The dealership has replaced the flasher unit and fuse several times but the problem still occurs. The cause of the lights blowing has yet to be determined.