i need a wiring diagram for a 87 firebird

i just bought another firebird. but the owner before me butchered the wiring when they changed the motor. now my alternator wont charge. i have had the alternator tested it is good. but i cant figure out why the alternator isnt charging. can anyone help me out? a wiring diagram would be great.

hmm.. i would like to help..but i dont know where to start.

after your alternator, it should go to the voltage regulator..which should go to the battery..if im not mistaken...

but just to be sure, if i were you, id just buy a manual. those things werk wonders :] most come with a COMPLETE wiring diagram for whatever years they cover...

so yeah..good luck dude..i was searching online for some free ones, but it gives me some honda wiring diagram for subs..or something -_-

Do your gauges work? The voltage gauge is in the regulater's feedback loop and controls alternator output.

i just bought another firebird. but the owner before me butchered the wiring when they changed the motor. now my alternator wont charge. i have had the alternator tested it is good. but i cant figure out why the alternator isnt charging. can anyone help me out? a wiring diagram would be great.
autozone.com/repairinfo has some basic ones for that car.

yes my guage for my amps works but none of my other guages work and one other thing i noticed is when i hit my brakes my parking lights come on