1988 Cadillac Deville Sedan | Stereo Wiring Diagram 1988 Cadillac Deville Sedan Speaker Sizes. Audio Front Speakers Size: 4″ x 6″ Speakers Audio Rear Speakers Size: 6″ x 9″ Speakers. The following information is currently not available: Stereo Amp Trigger Wire *If you know any of the above or any other missing information please use the comment box below to Cadillac DeVille (1999) - fuse box diagram - Auto Genius Cadillac DeVille (1999) – fuse box diagram. Year of production: 1999. Maxi Fuses/Relay Center. The MaxiFuses and relays are located next to the engine compartment fuse block on the driver’s side of the engine. Cadillac DeVille – fuse box diagram – maxi fuses/relay center 1988 Cadillac Deville Wiring Fire at Fuse Block Led to Left cadillac deville Fuse Box Diagrams Please Lost Interior Lights, Remote Trunk Release, Remote Trunk Opener, Remote Fuel Door Opener, Power Door Locks Examined Related Fuses And.. 1988 Cadillac DeVille; Recently had trouble with radiator 1988 Cadillac DeVille; Recently had trouble with radiator fan motor staying on after turning off car, I will send the fuse diagram for the message center as soon as i can. then I will sum all this up. bear with me, as you have. back as quick as I can. Ask Your Own Cadillac Question. Customer reply replied 7 years ago. Right on, thanks!