Where in this pic is a good place to ground?

Need to ground the brake controller. Where?

 

An O-ring crimp connector under that bright silver bolt left of pic center.

 

So i can unscrew that bolt and put the o ring on and screw bolt back in? And I'm good?

 

Yessir, as long as what I'm seeing in the pic is a bolt that threads into a nut which is welded onto the body of the truck... I don't have mine in front of me so I can't see if that's the case. Bottom line: as long as a nut is metal and it's welded to the body or frame of the truck, you can ground under a bolt which threads into it.

 

I agree with "horstuff". And if you don't want to take out that bolt ypu can just drill a hole and screw in a small sheet metal screw.Or just tap into any number of ground wires in the wiring harness.

 

My 2 cents... I used to be (back in the prehistoric 80's) a pro car stereo installer, and I found that the only really good / reliable / bulletproof way to ground something is to head for a factory bolt, take it out, properly crimp a properly sized o-ring connector onto your wire, put it on the factory bolt, bolt back in (good idea to scrape a bit of paint off the body where the ring will go as well so it's not solely dependent on the back of the bolt for good conductivity).

Drilling a hole and then putting in a screw can get dicey, meaning it's not always easy to know if what you are tapping into is indeed welded to the body/ frame, plus the screw usually wiggles loose in a pretty short time and then you've got intermittent headaches. Tapping into factory harnesses (unless you are absolutely sure of what you are doing) can reduce required juice to whatever it was grounding in the first place OR may not be enough of a ground for what you are grounding. Plus, unless you have the proper connectors, most people tap into wires in very goofy ways (strip and tape being one).

 

OP, your image has disappeared. Did you embed it?

 

hmmm...I still see it. I just copied and pasted

 

Because it wasn't properly uploaded, I think you are seeing your browser cache. You can hit Edit > More Options > Upload A File, select a file, select Full Image > Save Changes.

 

Ok. did that. Now I see 2 images

 

ha ha. You see the properly embedded image and you see your browser cached image. We just see the proper image and then a little error underneath which won't hurt anybody. You're all good.