tell us more.
what is and isn't working on this bike? Did it once have turn signals? If the taillight/brake light isn't working, I'd want to start by taking off the lens and looking there. I did not see stripped wires in the pack of the rear, just the front.
The front looked like there were ready to connet to a switch or a lamp. Do you have a kill switch on this ped?
Lots of question...no answers, sorry.
PS. from another post..some pedders buy and use boaters horns that used tiny cans of compressed air...really LOUD.