I'd be checking wiring closely .
Could be a grounded hot wire or simply loose connection(s) .
All connections should be shiny clean and scratch tight . That includes all grounding points .
Here's a free downloadable service manual to help :
https://drive.google.com/drive/folders/1xzSqebrL4bLYS5pPZlUlB_Hta2bLoNWC
And an Owner's manual :
https://drive.google.com/drive/folders/1xzSqebrL4bLYS5pPZlUlB_Hta2bLoNWC