Cadillac Allante Forum Discussion, New to Allante - Allante Headlight Problem in Past Cadillac Vehicle Discussion; Hello,
I just purchased a 1990 Allante and it has numerous problems that I am trying to figure out and ...
I just purchased a 1990 Allante and it has numerous problems that I am trying to figure out and fix. The headlights do not work. I have pulled the bulbs out and tried them in another non Cadillac car and they work fine. I metered the wire connections on the Allante and I have voltage at the wires (11.7 volts), yet the lights don't work.
The lighting system on 1987 through 1992 Allantés is very sophisticated. The bulb filaments are turned on by solid state switches called OSM's which are operated by the body computer module. You need to get a factory service manual to troubleshoot this system.