most lickly you blew the main fues which should be located either on the positive cable of in the main fues box
you have burt up your altnator get it checked at autozone for free
The old battery was bad it could cause a power surge and plow the main fuse.
you have a bad electrical connection. Start at you battery and work back through the rest of the car.
One reason a 1989 F-150 may not start is a bad battery.
Check you battery
Ford Probe was created in 1989.
how to check the fluid on a manual transmission for a 1989 ford probe gt
How is your battery ? Try a battery charger , battery jumpstarter pack , or a battery boost and see if it starts . ( also, it could be a battery cable connection )
The fuses are located under the hood beside the battery.
if you have the exhaust manifold, oil lines, etc. from the 89 GT then yes.
b/c the battery is dead. b/c the battery is dead.
when you unhook the battery the computer probably resets itself.