[Daveyman]

I have a 2020 CForce 500... I have had nothing but problems with it... I only have 720kms on it... my latest issue is... It sat idle because it was running rough, and it was a busy summer... want to get it started now so I can sell it... put a replacement battery on her, made sure she was charged, went to start... starter clicks, no go.  The electronics light up, only in a sweet spot, then, apply the brake pedal, electronics die... I figure there must be a bad ground somewhere, but, where do I even begin to look?

[NMKawierider]

Test the power under load coming out of the main fuse holder. There has a lot of issues with bad internal crimps in the 2018-2020s. The fuse will be fine, but it's a connection inside that's a problem. With no load it will read fine so test it with something like the lights and ignition on.