What would keep my elec speedometer and inter. Lights from working do they run off the same thing
Also the buttons for fuel door and trunk don't work but radio does ac does
Check the fuse box for the speedometer and interior lights fuses. The truck and fuel door are over ridden by the valet button.
Which fuse box specifically is for the elec speedometer
There's not a lot of details on the internet to advise on your specific problem. The owners on this forum should be able to direct you --- http://www.cadillacforums.com/forums/cadillac-deville-1985-2005- including-1985/
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