You can find a wiring schematic for the fuel pump circuit open wiring on a 1991 Town Car in do-it-yourself repair manuals. Haynes makes one of the most popular manuals.
You can find wiring schematic @www.modifiedlife.com falconspath
Haynes makes a manual with the wiring schematic for the O2 sensor on a 1991 Chevy Blazer S10. The manual can be found at most book stores.
schematic on 1991 cadillac fleetwood air condition
At a Chevy dealer
If a repair shop will not run you off a schematic then go to a parts house and buy a Haynes Manual.
They are 5"x7" front ant rear, http://www.modifiedlife.com/1991-mercury-cougar-car-audio-wiring-schematic/
You can find the wiring diagram for the starting/charging circuit in a Haynes manual for this car. You can get one at any local parts store. You can also find wiring diagrams at www.the12volt.com
A wiring diagram, for a 1991 Pontiac Firebird, can be obtained from most General Motors dealerships. The wiring diagram can also be found at most auto-parts stores.
Try PAINLESSWIRING.COM. They will help you with the wiring if you have any problem.
You can find wiring diagrams for this vehicle at www.autozone.com.
go to oreillys and buy a chilton book for your vehicle wiring diagram is in it
You can see a wiring diagram for a 1991 883 Harley Davidson Sportster at your local auto parts store. Repair books, such as Haynes, have pictures of wiring diagrams in them.