Audio Systems: wirring car audio, 1990 cadillac fleetwood, cadillac fleetwood

Question
how do i wire a car stereo on 1990 Cadillac fleetwood brougham with out a wiring harness?

Answer
Go to this site, near the bottom, for the wiring diagram:

http://installdr.com/InstallDocs/GM/PDF/460017.pdf

That will give you the wiring of the car, then with the new unit you are installing you can match up the ins and outs....

But, why don't you use a wiring harness?  It will simplify the work much.  You can purchase a harness at Walmart for about $10!

Good Luck,
C