Most likely point of failure. Wiring harness grounds in headlight.

I've got an 82 xj750 maxim that I'm almost done putting back together. I'm having some electrical issues. My left turn signal works, but that's grounded to my frame my right doesn't using the grounds off the wiring harness but it does if I touch the ground wire to the frame. Headlight is almost exactly the same, doesn't work unless I bring the ground to the frame. I'm a bit weirded out because it starts no problem despite these issues. I have done the atari delete on the wiring harness so I'm not sure if that's what's causing issues. I've also sandblasted and repainted the frame. Maybe I painted over a spot that would cause the issues described? I'm just not sure. Rather than pulling a ton of things apart tracking the problem I'd thought I'd ask here first.

 

I think you already know how to solve your problem.

 

I don't know how similar the 750 is to the 650 but when I rebuilt mine nothing worked once assembled. My wiring harness has the harness ground wire attaching to the frame at the ignition coil mount. Since I had powder coated the frame, it was not getting any continuity where it attached to frame.

 

Bolt on left in picture below, that wire is ground connection for all ground wires in the harness.

 

Thank you for your faith k-moe, but I'm flying by the seat of my pants on this one. And doubly thank you jayrodoh that was it. Sanded down both sides of that bracket and things are working now.

 

Like I said, you already knew the solution. The how is all you were lacking.

 

Yeah. I warned ahead I'd be asking a ton of stupid questions. Thankfully the search function has kept most of them in check. This is just the first bike I've really worked on aside from oil changes and chain maintenance.