I have had my 500 since 2013 and LOVED it and now I have so many electrical issues and no one can seem to help so I thought I would jump on here and compare notes - Lisa
Lots of random electrical issues is nearly always the wiring harness that passes into the boot. The wires under the rubber boot can get fatigued from bending open and closed, and eventually break.
You can get a repair kit to splice into the original wiring. Some of these are wrapped in silcone rather than plastic and seem to be more durable but as long as the wires are new, they'll last years.
Any auto-electrician should be able to replace the broken wires with the new kit.