Can I fix my flasher relay?

[Heezea]

Hey guys to avoid relay buzzing from running LEDs, I was trying to cut the trace per the instructions here: http://www.motobrick.com/index.php?topic=659.0. I feel like that went well but when I plugged the relay back in I got nothing at all. No buzzing, no flashing, nothing. I thought maybe I blew a fuse but I checked the harness side connector by putting the Voltmeter black on the -battery terminal and VM red on the fuse 3 and fuse 7 connectors and they both showed 12.5 volts.

Then I took a closer look at the flasher relay board and I noticed some weird stuff on one of the tracers, like maybe some damage occurred. I didn't notice this before but I wasn't looking for it either. I tested resistance between the two solder points at the ends of the tracer and measured 0L? This has to be bad since it looks like it should be just a straight tracer with no interruption or resistance.

Should I try to solder this tracer back to 0 resistance? I have this really needle fine soldering tip that I used to cut the other tracer. I think I could restore the tracer that got jacked up.




Details on the bike: 1986 K75C. She's been stripped down and I traded the instrument cluster for a more simple speedo with RBM's help and his control board. Also, the previous owner removed the ignition key and installed a toggle switch. I haven't had any electrical problems other than the 4-pin fuel connector I just replaced. I put about 1500 miles since I got her from the previous owner and she's been running really nicely.

[rbm]

Yes, it should be straight forward to repair the damaged trace you've pointed out in your photo.  You'll need 30GA bare wire wrap wire but you can extract a strand of wire from any 18GA stranded insulated wire that you might have lying around. 

To make the repair, scrape away the soldermask (green stuff) on both sides of the damaged trace using a utility knife. You're looking to remove the solder mask but leave behind gleaming clean copper traces.  Once that is done, take an extra long piece of 30GA bare wire and lay it across the damaged area.  Make sure to use solder flux on the joint so that the solder flows.  Solder the wire in place, holding on to it with the excess length.  Once in place, use the utility knife to cleanly slice off the excess at the solder joint.  Test for continuity.

The following Instructable shows the theory although the execution leaves A LOT to be desired.  The results are VERY crude.

The flash from the mobile phone has obscured details around the modification you made at Pin 7 so I can't comment whether you've also damaged nearby traces.

[Heezea]

rbm, WE DID IT! It works! Ok that's a really fat wad of solder with a tiny wire buried in it but that is seriously my most concentrating best effort with my undeveloped soldering fine motor skills haha. Plugged it in and flashers work like a charm! I tried to offset the flash so you could see the other pin but I guess it must be fine since it's working perfectly!