Biz R Electrical Issues

[StangGuy175]

Right Off The Bat... I'd Like To Say That This Forum Page Is An Exellent Resource For Information And With No Disrespect To All You Car Guys And Gear Heads Out There,
I'd Really Like An Ase Type Professional To Answer My Question. Thanks.

My Problem:

I Have A 1991 Mustang Gt 5.0 W/ Aod That Was Swaped Out For A 5-spd.

When I Bought The Car The Curse, Dash Lights, Cig Lighter, (could Be Door Sylonoids), Power Door Locks Did Not Work.

Six Months Later All Of The Above Plus The: Dome Light, Horn, Radio Now Does Not Work!

I Tested The Fuse Box W/ A Test Light And 4-5 Circuts Hve No Juice Going To Them, But The Fuses Are Good.

Also The Car Has An After Market Cd Player In It And The Guy I Biught It Off Of Seemed To Do A Pretty Good Hack Job On The Wiring.

I Am Very Confused Being That Electrical Problems Are Not My Strong Suit.
Any Insight Into This Problem Is Greatly Appricated.