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To view instructions on brake adjustments to testing magnets, surf page 13 - 16 within
- Click Here - Note: Page 20 - 22 shows how to measure current flow in the Magnets.
If replacing brake wiring, I'd recommend removing the factory linear wiring and install much better STAR design. For more details, surf:
- Click Here - - Click Here - - Click Here - - Click Here - If wondering... I installed STAR wiring (outside the axle using thick 10 gauge wiring) under each of my Utility, RV/TT and boat trailers and their BEFORE and AFTER results are amazing. NO more weak brakes and their behaviour is now predictable. IMO, STAR design wiring inside plastic PEX piping and plastic loom (which doesn't rust) should be factory minimum build.
Hope this helps.