Positive lead issue.

1985slab

New member
Nov 4, 2018
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Just got a 1985gsxr750. Needs a lot of tlc😂
Took out the battery for a charge and the positve lead has broken from corrosion. Not very cluey on electrics. I followed it back and goes into a little black box( yes I told you I'm not cluey) cant get it out to look. Need to soaks the screws in crc first. Thought I would ask here for some help to rewire it.