On Wednesday, February 5, 2020 at 2:30:05 AM UTC-8, Colin Roney wrote:
I admit I am a total dummy when it comes to glider
electrics and navigation installation stuff but I am very keen
to try and correct the situation. Does anyone have any
ideas for suggested reading in order to try and understand
the subject.

The FAA has several aviation maintenance technician handbooks that are excellent and, better yet, they're FREE:
https://www.faa.gov/regulations_poli...uals/aircraft/
Ch. 12 of the general handbook and Ch. 9 of Vol. 1 cover electrical subjects.

Tom