If you have a battery,hook up the car.???
But I highly recommend getting a shop manual for your car since it has all the troubleshooting and testing of the system.
It is complicated and take too much time here to explain.
The amplifier is the brain of the system.
Cars equipped with this system has a totally different wiring harness under the dash since all exterior lighting goes through the amplifier,additional relays,and different headlamp switch.
It can be swapped out but a lot of work.
Some parts throughout the years did interchange like the photcell in the dash was used up to 1977.
Amplifiers from 1967 and older will not work with newer cars,and some are different than others for the later years.
A parts catalogue and parts interchange guide may come in handy.
The site in my sig is my home page and I am a moderator there.
Feel free to join,we do welcome all with interest in Mopars from 1955 to 1987 with a high membership that contains many C body barge lovers.
Also check out the C body dry Dock
http://www.cbodydrydock.com/news.php