I've been cleaning grounds today. The one on the passenger side battery was easy.

The transmission ground had never been done but was also pretty easy. I would say that the cable there was a lot narrower than my last vehicle.

The one from the driver side battery disappeared into 1/4" of gunk a bit south-east of the water-pump. When I got a lot of that cleaned out, it seemed very shiny underneath all that and I am thinking about leaving that one alone. It's a little trickier to get a wrench into there behind a main coolant hose, with some other small diameter lines connecting to something else right there too.

Are there any other ones I'm missing? Did I trace the one from the driver side battery correctly?

 

and duhh-huhh, I forgot to mention the heavy gauge ground coming off the passenger side battery. this goes on down to the frame to a bolt not that hard to pull off, but wasn't all that dirty neither. however right at the connection a small gauge wire runs back to yet another ground point on top of a long-wise bar of the frame. this little connection point sits right under one of the big lines coming out of the turbo (I've never understood what those two y-ed lines coming back out of the turbo do ... exhaust? air overflow? need to learn more about this). anyway if you had that line off the turbo it would be a good time to get this little ground point too, though it likely isn't that dirty in such a non-exposed location. the big hot wire to the starter hangs just above it too but isn't really in the way.

 

oh and for future reference that wasn't quite a 'transmission' ground...it was just a cable from one part of the frame to another, not connected to the trans at all. I projected that idea onto it from another vehicle. haven't noticed one connected to the trans yet, need to look around again I guess.