2013 STS - any help/ideas on how to clean corrosion from fuse box & wiring?

[Byron Sims]

I’m looking for help or suggestions on how to clean the fuse box and wiring harness of corrosion. Please let me know if anyone else has had this same issue and how you corrected the problem.

[2dogs]

Baking soda as well as WD40 will help clean up corrosion. Use baking soda first and WD40 to prevent it from coming back. Use just water and compressed air (if you have it) to clean up the baking soda.

[Bfromla]

First- Disconnect battery then you can carefully attempt to clean. There are a few spray solvents that claim to work; sorry, I have not tried them. When I was employed & cleaning small electronics contact & circuit boards, we used isopropyl alcohol; & on the deep hard stuff, simple pencil erasers with iso follow up. The cleaners were also wooden q-tips; a lil stronger & with thicker tips. I do suggest having a good number of q-tips on hand for the tight areas.

[Byron Sims]

Thank you for the suggestions..

[Adventurer]

I’m looking for help or suggestions on how to clean the fuse box and wiring harness of corrosion. Please let me know if anyone else has had this same issue and how you corrected the problem.

1. you’ll need to determine the reason for the extensive corrosion and correct it. In my case I cracked the black outer fuse box cover that let rain and wash water directly into the fuse box. And because it is waterproof except for the crack I caused, the offending water stayed in there a long time!
2. Definitely disconnect the battery. Pull all the fuses and relays out. Inspect for internal corrosion inside the j-case fuses & replace. Manually clean the terminals of blade fuses and relays with a bristle brush. Manually clean the interior of the fuse openings.
3. Spray the fuse and relay blades with CorrisionX or DeoxIT D5 (see photo attached). Spray the interior parts of the fuse box with one of the corrosion treatments. Manually clean everything again while wet with cleaner.
4. Fill a spray bottle with distilled water and thoroughly rinse everything off. Set a fan on the area and let it dry like that overnight.
5. Repeat cleaning steps above. I repeated the process three times. Do not reassemble and try to start until completely dry.

I don’t think corrosion got into my wiring harness so I’m no help there.

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