Greetings,

I'm wondering how many ground wires typically bolt to the frame or elsewhere like the starter on a 2008 Suzuki Boulevard C90T?

I've attached the wiring diagram if that helps but a ground point like the frame isn't identified. Bottom line I've had charging issues and I want to rule out a bad ground or the most common ground issues. The starter connection looks fine. I'm not sure about the connection at the seat due to paint but that's the only frame ground I know of.

Thank you!

John