Is this extra ground cable from battery-to-chassis, a good idea? Or is just completely unnecessary or dangerous?
It won’t hurt anything and could actually help if the original cable is corroded, which is likely after 23 years.
ok, thanks, I will jst leave it as it is
Is there an aftermarket stereo system in the car?
That’s one of the “big three” wires people usually upgrade when trying to get maximum power with a mostly stock electrical system.
Yes, pretty much right, There’s a Pioneer stereo installed in this car.
what of the Amplifiers???
I’m not that quite sure if there are amplifiers installed in this car, only but for the aftermarket Pioneer stereo unit.
This vehicle likely benefits from an extra ground. Make sure to scrape the paint off the grounding points.
Dude that’s for an MK3 with a DPS6 you’re like 11 years too soon.
my bad, next time maybe lol.