Hi,

I love ground cables too!
There are two of them off the negative post.
When a ground goes sour, that is one half of all circuits in a car.
Counting the whole car blinking off and on all the way down the the radio memory, becomes a nice clue!
The quickness of it all makes it electrical.

The other thing is a positive wire going over the the little junction box on the fender. It’s also my favorite for being frail and subject to corrosion.
The factory wire is IMO slightly undersized for it duty but it works until Mother Nature creeps in.
That wire feeds into the cars fuse panel and interesting enough goes bad right out there on the battery terminal nut.

Phil