autozone net (in store only) has a 'free' repair guides for all vehicles ..and they find it for you!
You can find the fuse box diagram for the Buick Riviera online at places like auto-wiring-diagram.com. You can also find this diagram on the website called Team Buick or in the Buick Riviera owner's manual.
A wiring diagram will make sure that everything is connected correctly. The wiring diagram for a 1992 Buick Skylark can be found in either of its manuals.
Wiring diagram of what component?
No such thing as "free". alldata.com charges about $20. or you can e-mail me at cavemanautomike@yahoo.com and I may be able to help.
You can find the heater wiring diagram for a 1989 Buick LeSabre in the vehicle's owner's manual. You can also obtain it from various auto part stores.
Check www.autozone.com
When working on anything electrical, having a diagram comes in handy. The wiring diagram for this car can be found in its maintenance manual.
You can find this at you local public library...........
try googling it or you can try find it on eBay
umm ... you can try ebay, m8
installdr.com
A wiring diagram can sometimes be obtained from an auto tech at an auto part store as a print out. However, it can also be found in the cars maintenance manual.